RENESAS M16C/29

REJ09B0101-0112
M16C/29 Group
16
Hardware Manual
RENESAS MCU
M16C FAMILY / M16C/Tiny SERIES
All information contained in these materials, including products and product specifications,
represents information on the product at the time of publication and is subject to change by
Renesas Technology Corp. without notice. Please review the latest information published
by Renesas Technology Corp. through various means, including the Renesas Technology
Corp. website (http://www.renesas.com).
Rev. 1.12
Revision Date: Mar.30, 2007
www.renesas.com
Notes regarding these materials
1. This document is provided for reference purposes only so that Renesas customers may select the appropriate
Renesas products for their use. Renesas neither makes warranties or representations with respect to the
accuracy or completeness of the information contained in this document nor grants any license to any
intellectual property rights or any other rights of Renesas or any third party with respect to the information in
this document.
2. Renesas shall have no liability for damages or infringement of any intellectual property or other rights arising
out of the use of any information in this document, including, but not limited to, product data, diagrams, charts,
programs, algorithms, and application circuit examples.
3. You should not use the products or the technology described in this document for the purpose of military
applications such as the development of weapons of mass destruction or for the purpose of any other military
use. When exporting the products or technology described herein, you should follow the applicable export
control laws and regulations, and procedures required by such laws and regulations.
4. All information included in this document such as product data, diagrams, charts, programs, algorithms, and
application circuit examples, is current as of the date this document is issued. Such information, however, is
subject to change without any prior notice. Before purchasing or using any Renesas products listed in this
document, please confirm the latest product information with a Renesas sales office. Also, please pay regular
and careful attention to additional and different information to be disclosed by Renesas such as that disclosed
through our website. (http://www.renesas.com )
5. Renesas has used reasonable care in compiling the information included in this document, but Renesas
assumes no liability whatsoever for any damages incurred as a result of errors or omissions in the information
included in this document.
6. When using or otherwise relying on the information in this document, you should evaluate the information in
light of the total system before deciding about the applicability of such information to the intended application.
Renesas makes no representations, warranties or guaranties regarding the suitability of its products for any
particular application and specifically disclaims any liability arising out of the application and use of the
information in this document or Renesas products.
7. With the exception of products specified by Renesas as suitable for automobile applications, Renesas
products are not designed, manufactured or tested for applications or otherwise in systems the failure or
malfunction of which may cause a direct threat to human life or create a risk of human injury or which require
especially high quality and reliability such as safety systems, or equipment or systems for transportation and
traffic, healthcare, combustion control, aerospace and aeronautics, nuclear power, or undersea communication
transmission. If you are considering the use of our products for such purposes, please contact a Renesas
sales office beforehand. Renesas shall have no liability for damages arising out of the uses set forth above.
8. Notwithstanding the preceding paragraph, you should not use Renesas products for the purposes listed below:
(1) artificial life support devices or systems
(2) surgical implantations
(3) healthcare intervention (e.g., excision, administration of medication, etc.)
(4) any other purposes that pose a direct threat to human life
Renesas shall have no liability for damages arising out of the uses set forth in the above and purchasers who
elect to use Renesas products in any of the foregoing applications shall indemnify and hold harmless Renesas
Technology Corp., its affiliated companies and their officers, directors, and employees against any and all
damages arising out of such applications.
9. You should use the products described herein within the range specified by Renesas, especially with respect
to the maximum rating, operating supply voltage range, movement power voltage range, heat radiation
characteristics, installation and other product characteristics. Renesas shall have no liability for malfunctions or
damages arising out of the use of Renesas products beyond such specified ranges.
10. Although Renesas endeavors to improve the quality and reliability of its products, IC products have specific
characteristics such as the occurrence of failure at a certain rate and malfunctions under certain use
conditions. Please be sure to implement safety measures to guard against the possibility of physical injury, and
injury or damage caused by fire in the event of the failure of a Renesas product, such as safety design for
hardware and software including but not limited to redundancy, fire control and malfunction prevention,
appropriate treatment for aging degradation or any other applicable measures. Among others, since the
evaluation of microcomputer software alone is very difficult, please evaluate the safety of the final products or
system manufactured by you.
11. In case Renesas products listed in this document are detached from the products to which the Renesas
products are attached or affixed, the risk of accident such as swallowing by infants and small children is very
high. You should implement safety measures so that Renesas products may not be easily detached from your
products. Renesas shall have no liability for damages arising out of such detachment.
12. This document may not be reproduced or duplicated, in any form, in whole or in part, without prior written
approval from Renesas.
13. Please contact a Renesas sales office if you have any questions regarding the information contained in this
document, Renesas semiconductor products, or if you have any other inquiries.
General Precautions in the Handling of MPU/MCU Products
The following usage notes are applicable to all MPU/MCU products from Renesas. For detailed usage notes
on the products covered by this manual, refer to the relevant sections of the manual. If the descriptions under
General Precautions in the Handling of MPU/MCU Products and in the body of the manual differ from each
other, the description in the body of the manual takes precedence.
1. Handling of Unused Pins
Handle unused pins in accord with the directions given under Handling of Unused Pins in the
manual.
 The input pins of CMOS products are generally in the high-impedance state. In operation
with an unused pin in the open-circuit state, extra electromagnetic noise is induced in the
vicinity of LSI, an associated shoot-through current flows internally, and malfunctions occur
due to the false recognition of the pin state as an input signal become possible. Unused
pins should be handled as described under Handling of Unused Pins in the manual.
2. Processing at Power-on
The state of the product is undefined at the moment when power is supplied.
 The states of internal circuits in the LSI are indeterminate and the states of register
settings and pins are undefined at the moment when power is supplied.
In a finished product where the reset signal is applied to the external reset pin, the states
of pins are not guaranteed from the moment when power is supplied until the reset
process is completed.
In a similar way, the states of pins in a product that is reset by an on-chip power-on reset
function are not guaranteed from the moment when power is supplied until the power
reaches the level at which resetting has been specified.
3. Prohibition of Access to Reserved Addresses
Access to reserved addresses is prohibited.
 The reserved addresses are provided for the possible future expansion of functions. Do
not access these addresses; the correct operation of LSI is not guaranteed if they are
accessed.
4. Clock Signals
After applying a reset, only release the reset line after the operating clock signal has become
stable. When switching the clock signal during program execution, wait until the target clock
signal has stabilized.
 When the clock signal is generated with an external resonator (or from an external
oscillator) during a reset, ensure that the reset line is only released after full stabilization of
the clock signal. Moreover, when switching to a clock signal produced with an external
resonator (or by an external oscillator) while program execution is in progress, wait until
the target clock signal is stable.
5. Differences between Products
Before changing from one product to another, i.e. to one with a different part number, confirm
that the change will not lead to problems.
 The characteristics of MPU/MCU in the same group but having different part numbers may
differ because of the differences in internal memory capacity and layout pattern. When
changing to products of different part numbers, implement a system-evaluation test for
each of the products.
How to Use This Manual
1.
Purpose and Target Readers
This manual is designed to provide the user with an understanding of the hardware functions and electrical
characteristics of the MCU. It is intended for users designing application systems incorporating the MCU. A basic
knowledge of electric circuits, logical circuits, and MCUs is necessary in order to use this manual.
The manual comprises an overview of the product; descriptions of the CPU, system control functions, peripheral
functions, and electrical characteristics; and usage notes.
Particular attention should be paid to the precautionary notes when using the manual. These notes occur
within the body of the text, at the end of each section, and in the Usage Notes section.
The revision history summarizes the locations of revisions and additions. It does not list all revisions. Refer
to the text of the manual for details.
The following documents apply to the M16C/29 Group. Make sure to refer to the latest versions of these documents.
The newest versions of the documents listed may be obtained from the Renesas Technology Web site.
Document Type
Description
Document Title
Document No.
M16C/29 Group
This hardware
Hardware manual Hardware specifications (pin assignments,
Hardware Manual manual
memory maps, peripheral function
specifications, electrical characteristics, timing
charts) and operation description
Note: Refer to the application notes for details on
using peripheral functions.
REJ09B0137
Software manual Description of CPU instruction set
M16C/60,
M16C/20,
M16C/Tiny Series
Software Manual
Available from Renesas
Application note Information on using peripheral functions and
Technology Web site.
application examples
Sample programs
Information on writing programs in assembly
language and C
Renesas
Product specifications, updates on documents,
technical update etc.
2.
Notation of Numbers and Symbols
The notation conventions for register names, bit names, numbers, and symbols used in this manual are described
below.
(1)
Register Names, Bit Names, and Pin Names
Registers, bits, and pins are referred to in the text by symbols. The symbol is accompanied by the word
“register,” “bit,” or “pin” to distinguish the three categories.
Examples the PM03 bit in the PM0 register
P3_5 pin, VCC pin
(2)
Notation of Numbers
The indication “2” is appended to numeric values given in binary format. However, nothing is appended to the
values of single bits. The indication “16” is appended to numeric values given in hexadecimal format. Nothing
is appended to numeric values given in decimal format.
Examples Binary: 112
Hexadecimal: EFA016
Decimal: 1234
3.
Register Notation
The symbols and terms used in register diagrams are described below.
XXX Register
b7
b6
b5
b4
b3
*1
b2
b1
b0
Symbol
XXX
0
Bit Symbol
XXX0
Address
XXX
Bit Name
XXX bits
XXX1
After Reset
0016
Function
RW
1 0: XXX
0 1: XXX
1 0: Do not set.
1 1: XXX
RW
RW
(b2)
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined.
(b3)
Reserved bits
Set to 0.
RW
XXX bits
Function varies according to the operating
mode.
RW
XXX4
*3
XXX5
WO
XXX6
RW
XXX7
XXX bit
*2
b1 b0
0: XXX
1: XXX
*4
RO
*1
Blank: Set to 0 or 1 according to the application.
0: Set to 0.
1: Set to 1.
X: Nothing is assigned.
*2
RW: Read and write.
RO: Read only.
WO: Write only.
−: Nothing is assigned.
*3
• Reserved bit
Reserved bit. Set to specified value.
*4
• Nothing is assigned
Nothing is assigned to the bit. As the bit may be used for future functions, if necessary, set to 0.
• Do not set to a value
Operation is not guaranteed when a value is set.
• Function varies according to the operating mode.
The function of the bit varies with the peripheral function mode. Refer to the register diagram for information
on the individual modes.
4.
List of Abbreviations and Acronyms
Abbreviation
ACIA
bps
CRC
DMA
DMAC
GSM
Hi-Z
IEBus
I/O
IrDA
LSB
MSB
NC
PLL
PWM
SFR
SIM
UART
VCO
Full Form
Asynchronous Communication Interface Adapter
bits per second
Cyclic Redundancy Check
Direct Memory Access
Direct Memory Access Controller
Global System for Mobile Communications
High Impedance
Inter Equipment bus
Input/Output
Infrared Data Association
Least Significant Bit
Most Significant Bit
Non-Connection
Phase Locked Loop
Pulse Width Modulation
Special Function Registers
Subscriber Identity Module
Universal Asynchronous Receiver/Transmitter
Voltage Controlled Oscillator
All trademarks and registered trademarks are the property of their respective owners.
IEBus is a registered trademark of NEC Electronics Corporation.
Table of Contents
Quick Reference to Pages Classified by Address _____________________ B-1
1. Overview ____________________________________________________ 1
1.1 Features ........................................................................................................................... 1
1.1.1 Applications ................................................................................................................ 1
1.1.2 Specifications ............................................................................................................. 2
1.2 Block Diagram .................................................................................................................. 4
1.3 Product List ....................................................................................................................... 6
1.4 Pin Assignments ............................................................................................................. 12
1.5 Pin Description ............................................................................................................... 18
2. Central Processing Unit (CPU) __________________________________ 21
2.1 Data Registers (R0, R1, R2 and R3) .............................................................................. 21
2.2 Address Registers (A0 and A1) ...................................................................................... 21
2.3 Frame Base Register (FB) .............................................................................................. 22
2.4 Interrupt Table Register (INTB) ....................................................................................... 22
2.5 Program Counter (PC) .................................................................................................... 22
2.6 User Stack Pointer (USP) and Interrupt Stack Pointer (ISP) .......................................... 22
2.7 Static Base Register (SB) ............................................................................................... 22
2.8 Flag Register (FLG) ........................................................................................................ 22
2.8.1 Carry Flag (C Flag) .................................................................................................. 22
2.8.2 Debug Flag (D Flag) ................................................................................................. 22
2.8.3 Zero Flag (Z Flag) ................................................................................................... 22
2.8.4 Sign Flag (S Flag) .................................................................................................... 22
2.8.5 Register Bank Select Flag (B Flag) .......................................................................... 22
2.8.6 Overflow Flag (O Flag) ............................................................................................. 22
2.8.7 Interrupt Enable Flag (I Flag) ................................................................................... 22
2.8.8 Stack Pointer Select Flag (U Flag) ........................................................................... 22
2.8.9 Processor Interrupt Priority Level (IPL) .................................................................... 22
2.8.10 Reserved Area ....................................................................................................... 22
3. Memory ____________________________________________________ 23
4. Special Function Registers (SFRs) _______________________________ 24
A-1
5. Resets _____________________________________________________ 35
5.1 Hardware Reset .............................................................................................................. 35
5.1.1 Hardware Reset 1 .................................................................................................... 35
5.1.2 Brown-Out Detection Reset (Hardware Reset 2) ..................................................... 35
5.2 Software Reset ............................................................................................................... 36
5.3 Watchdog Timer Reset ................................................................................................... 36
5.4 Oscillation Stop Detection Reset .................................................................................... 36
5.5 Voltage Detection Circuit ................................................................................................ 38
5.5.1 Low Voltage Detection Interrupt ............................................................................... 41
5.5.2. Limitations on Stop Mode ........................................................................................ 43
5.5.3. Limitations on WAIT Instruction ............................................................................... 43
6. Processor Mode _____________________________________________ 44
7. Clock Generation Circuit _______________________________________ 47
7.1 Main Clock ...................................................................................................................... 54
7.2 Sub Clock ....................................................................................................................... 55
7.3 On-chip Oscillator Clock ................................................................................................. 56
7.4 PLL Clock ....................................................................................................................... 56
7.5 CPU Clock and Peripheral Function Clock ..................................................................... 58
7.5.1 CPU Clock ................................................................................................................ 58
7.5.2 Peripheral Function Clock(f1, f2, f8, f32, f1SIO, f2SIO, f8SIO, f32SIO, fAD, fC32, fCAN0) ...... 58
7.5.3 ClockOutput Function ............................................................................................... 58
7.6 Power Control ................................................................................................................. 59
7.6.1 Normal Operation Mode ........................................................................................... 59
7.6.2 Wait Mode ................................................................................................................ 60
7.6.3 Stop Mode ............................................................................................................... 62
7.7 System Clock Protective Function .................................................................................. 66
7.8 Oscillation Stop and Re-oscillation Detect Function ....................................................... 66
7.8.1 Operation When CM27 bit = 0 (Oscillation Stop Detection Reset)........................... 67
7.8.2 Operation When CM27 bit = 1 (Oscillation Stop and Re-oscillation Detect Interrupt) . 67
7.8.3 How to Use Oscillation Stop and Re-oscillation Detect Function ............................. 68
8. Protection __________________________________________________ 69
A-2
9. Interrupts ___________________________________________________ 70
9.1 Type of Interrupts ............................................................................................................ 70
9.1.1 Software Interrupts ................................................................................................... 71
9.1.2 Hardware Interrupts ................................................................................................. 72
9.2 Interrupts and Interrupt Vector ........................................................................................ 73
9.2.1 Fixed Vector Tables .................................................................................................. 73
9.2.2 Relocatable Vector Tables ........................................................................................ 74
9.3 Interrupt Control .............................................................................................................. 75
9.3.1 I Flag ........................................................................................................................ 78
9.3.2 IR Bit ........................................................................................................................ 78
9.3.3 ILVL2 to ILVL0 Bits and IPL...................................................................................... 78
9.4 Interrupt Sequence ......................................................................................................... 79
9.4.1 Interrupt Response Time .......................................................................................... 80
9.4.2 Variation of IPL when Interrupt Request is Accepted ............................................... 80
9.4.3 Saving Registers ...................................................................................................... 81
9.4.4 Returning from an Interrupt Routine ......................................................................... 83
9.5 Interrupt Priority .............................................................................................................. 83
9.5.1 Interrupt Priority Resolution Circuit .......................................................................... 83
______
9.6 INT Interrupt ................................................................................................................... 85
______
9.7 NMI Interrupt ................................................................................................................... 86
9.8 Key Input Interrupt .......................................................................................................... 86
9.9 CAN0 Wake-up Interrupt ................................................................................................ 87
9.10 Address Match Interrupt ............................................................................................... 87
10. Watchdog Timer ____________________________________________ 89
10.1 Count Source Protective Mode ..................................................................................... 90
11. DMAC ____________________________________________________ 91
11.1 Transfer Cycles ............................................................................................................ 96
11.1.1 Effect of Source and Destination Addresses ......................................................... 96
11.1.2 Effect of Software Wait .......................................................................................... 96
11.2. DMA Transfer Cycles ................................................................................................... 98
11.3 DMA Enable .................................................................................................................. 99
11.4 DMA Request ................................................................................................................ 99
11.5 Channel Priority and DMA Transfer Timing ................................................................ 100
A-3
12. Timers ___________________________________________________ 101
12.1 Timer A ...................................................................................................................... 103
12.1.1 Timer Mode .......................................................................................................... 106
12.1.2 Event Counter Mode ............................................................................................ 107
12.1.3 One-shot Timer Mode .......................................................................................... 112
12.1.4 Pulse Width Modulation (PWM) Mode ................................................................. 114
12.2 Timer B ...................................................................................................................... 117
12.2.1 Timer Mode ......................................................................................................... 119
12.2.2 Event Counter Mode ............................................................................................ 120
12.2.3 Pulse Period and Pulse Width Measurement Mode ............................................ 121
12.2.4 A/D Trigger Mode ................................................................................................ 123
12.3 Three-phase Motor Control Timer Function ................................................................ 125
12.3.1 Position-Data-Retain Function ............................................................................. 136
12.3.2 Three-phase/Port Output Switch Function ........................................................... 138
13. Timer S __________________________________________________ 140
13.1 Base Timer ................................................................................................................. 151
13.1.1 Base Timer Reset Register(G1BTRR) ................................................................. 155
13.2 Interrupt Operation ..................................................................................................... 156
13.3 DMA Support .............................................................................................................. 156
13.4 Time Measurement Function ...................................................................................... 157
13.5 Waveform Generating Function .................................................................................. 161
13.5.1 Single-Phase Waveform Output Mode ................................................................. 162
13.5.2 Phase-Delayed Waveform Output Mode.............................................................. 164
13.5.3 Set/Reset Waveform Output (SR Waveform Output) Mode ................................. 166
13.6 I/O Port Function Select ............................................................................................. 168
13.6.1 INPC17 Alternate Input Pin Selection .................................................................. 169
________
13.6.2 Digital Debounce Function for Pin P17/INT5/INPC17 .......................................... 169
14. Serial I/O _________________________________________________ 170
14.1 UARTi (i=0 to 2) .......................................................................................................... 170
14.1.1 Clock Synchronous serial I/O Mode ..................................................................... 180
14.1.2 Clock Asynchronous Serial I/O (UART) Mode ..................................................... 188
14.1.3 Special Mode 1 (I2C bus mode)(UART2) ............................................................. 196
14.1.4 Special Mode 2 (UART2) ..................................................................................... 206
14.1.5 Special Mode 3 (IEBus mode)(UART2) .............................................................. 210
14.1.6 Special Mode 4 (SIM Mode) (UART2)................................................................. 212
A-4
14.2 SI/O3 and SI/O4 ........................................................................................................ 217
14.2.2 CLK Polarity Selection ........................................................................................ 220
14.2.1 SI/Oi Operation Timing ........................................................................................ 220
14.2.3 Functions for Setting an SOUTi Initial Value ....................................................... 221
15. A/D Converter _____________________________________________ 222
15.1 Operating Modes ........................................................................................................ 228
15.1.1 One-Shot Mode .................................................................................................... 228
15.1.2 Repeat mode ........................................................................................................ 230
15.1.3 Single Sweep Mode ............................................................................................ 232
15.1.4 Repeat Sweep Mode 0 ......................................................................................... 234
15.1.5 Repeat Sweep Mode 1 ......................................................................................... 236
15.1.6 Simultaneous Sample Sweep Mode .................................................................... 238
15.1.7 Delayed Trigger Mode 0 ....................................................................................... 241
15.1.8 Delayed Trigger Mode 1 ....................................................................................... 247
15.2 Resolution Select Function ......................................................................................... 253
15.3 Sample and Hold ........................................................................................................ 253
15.4 Power Consumption Reducing Function .................................................................... 253
15.5 Output Impedance of Sensor under A/D Conversion ................................................. 254
16. Multi-master I2C bus Interface _________________________________ 255
16.1 I2C0 Data Shift Register (S00 register) ....................................................................... 264
16.2 I2C0 Address Register (S0D0 register) ....................................................................... 264
16.3 I2C0 Clock Control Register (S20 register) ................................................................ 265
16.3.1 Bits 0 to 4: SCL Frequency Control Bits (CCR0–CCR4) ..................................... 265
16.3.2 Bit 5: SCL Mode Specification Bit (FAST MODE) .............................................. 265
16.3.3 Bit 6: ACK Bit (ACKBIT) ...................................................................................... 265
16.3.4 Bit 7: ACK Clock Bit (ACK-CLK) .......................................................................... 265
16.4 I2C0 Control Register 0 (S1D0) ................................................................................. 267
16.4.1 Bits 0 to 2: Bit Counter (BC0–BC2) ..................................................................... 267
16.4.2 Bit 3: I2C Interface Enable Bit (ES0) .................................................................... 267
16.4.3 Bit 4: Data Format Select Bit (ALS) ..................................................................... 267
16.4.4 Bit 6: I2C bus Interface Reset Bit (IHR) ............................................................... 267
16.4.5 Bit 7: I2C bus Interface Pin Input Level Select Bit (TISS) .................................... 268
16.5 I2C0 Status Register (S10 register) ........................................................................... 269
16.5.1 Bit 0: Last Receive Bit (LRB) ............................................................................... 269
16.5.2 Bit 1: General Call Detection Flag (ADR0) .......................................................... 269
A-5
16.5.3 Bit 2: Slave Address Comparison Flag (AAS) ..................................................... 269
16.5.4 Bit 3: Arbitration Lost Detection Flag (AL) ........................................................... 269
16.5.5 Bit 4: I2C bus Interface Interrupt Request Bit (PIN) ............................................. 270
16.5.6 Bit 5: Bus Busy Flag (BB) .................................................................................... 270
16.5.7 Bit 6: Communication Mode Select Bit (Transfer Direction Select Bit: TRX) ....... 271
16.5.8 Bit 7: Communication mode select bit (master/slave select bit: MST) ................ 271
16.6 I2C0 Control Register 1 (S3D0 register) .................................................................... 272
16.6.1 Bit 0 : Interrupt Enable Bit by STOP Condition (SIM ) ......................................... 272
16.6.2 Bit 1: Interrupt Enable Bit at the Completion of Data Receive (WIT) .................. 272
16.6.3 Bits 2,3 : Port Function Select Bits PED, PEC .................................................... 273
16.6.4 Bits 4,5 : SDA/SCL Logic Output Value Monitor Bits SDAM/SCLM .................... 274
16.6.5 Bits 6,7 : I2C System Clock Select Bits ICK0, ICK1 ............................................ 274
16.6.6 Address Receive in STOP/WAIT Mode ............................................................... 274
16.7 I2C0 Control Register 2 (S4D0 Register) ................................................................... 275
16.7.1 Bit0: Time-Out Detection Function Enable Bit (TOE) .......................................... 276
16.7.2 Bit1: Time-Out Detection Flag (TOF ).................................................................. 276
16.7.3 Bit2: Time-Out Detection Period Select Bit (TOSEL) .......................................... 276
16.7.4 Bits 3,4,5: I2C System Clock Select Bits (ICK2-4) ............................................... 276
16.7.5 Bit7: STOP Condition Detection Interrupt Request Bit (SCPIN).......................... 276
16.8 I2C0 START/STOP Condition Control Register (S2D0 Register) ............................... 277
16.8.1 Bit0-Bit4: START/STOP Condition Setting Bits (SSC0-SSC4) ............................ 277
16.8.2 Bit5: SCL/SDA Interrupt Pin Polarity Select Bit (SIP) .......................................... 277
16.8.3 Bit6 : SCL/SDA Interrupt Pin Select Bit (SIS) ...................................................... 277
16.8.4 Bit7: START/STOP Condition Generation Select Bit (STSPSEL) ....................... 277
16.9 START Condition Generation Method ....................................................................... 278
16.10 START Condition Duplicate Protect Function ........................................................... 279
16.11 STOP Condition Generation Method ........................................................................ 279
16.12 START/STOP Condition Detect Operation ............................................................... 281
16.13 Address Data Communication ................................................................................. 282
16.13.1 Example of Master Transmit ............................................................................. 282
16.13.2 Example of Slave Receive ................................................................................ 283
16.14 Precautions ............................................................................................................... 284
17. CAN Module ______________________________________________ 287
17.1 CAN Module-Related Registers ................................................................................. 288
17.1.1 CAN0 Message Box ............................................................................................. 289
17.1.2 Acceptance Mask Registers ................................................................................. 291
17.1.3 CAN SFR Registers ............................................................................................. 292
A-6
17.2 Operating Modes ........................................................................................................ 300
17.2.1 CAN Reset/Initialization Mode ............................................................................. 300
17.2.2 CAN Operating Mode ........................................................................................... 301
17.2.3 CAN Sleep Mode ................................................................................................. 301
17.2.4 CAN Interface Sleep Mode .................................................................................. 302
17.2.5 Bus Off State ........................................................................................................ 302
17.3 Configuration of the CAN Module System Clock ........................................................ 303
17.3.1 Bit Timing Configuration ....................................................................................... 303
17.3.2 Bit-rate .................................................................................................................. 304
17.4 Acceptance Filtering Function and Masking Function ................................................ 305
17.5 Acceptance Filter Support Unit (ASU) ........................................................................ 306
17.6 BasicCAN Mode ......................................................................................................... 307
17.7 Return from Bus off Function ...................................................................................... 308
17.8 Time Stamp Counter and Time Stamp Function ......................................................... 308
17.9 Listen-Only Mode ....................................................................................................... 308
17.10 Reception and Transmission .................................................................................... 309
17.10.1 Reception ........................................................................................................... 310
17.10.2 Transmission ...................................................................................................... 311
17.11 CAN Interrupts .......................................................................................................... 312
18. CRC Calculation Circuit _____________________________________ 313
18.1 CRC Snoop ................................................................................................................ 313
19. Programmable I/O Ports _____________________________________ 316
19.1 Port Pi Direction Register (PDi Register, i = 0 to 3, 6 to 10) ....................................... 316
19.2 Port Pi Register (Pi Register, i = 0 to 3, 6 to 10) ......................................................... 316
19.3 Pull-up Control Register 0 to 2 (PUR0 to PUR2 Registers) ........................................ 316
19.4 Port Control Register (PCR Register) ......................................................................... 316
19.5 Pin Assignment Control Register (PACR) ................................................................... 317
19.6 Digital Debounce Function ......................................................................................... 317
20. Flash Memory Version ______________________________________ 330
20.1 Flash Memory Performance ....................................................................................... 330
20.1.1 Boot Mode ........................................................................................................... 331
20.2 Memory Map ............................................................................................................... 332
20.3 Functions To Prevent Flash Memory from Rewriting .................................................. 335
20.3.1 ROM Code Protect Function ................................................................................ 335
20.3.2 ID Code Check Function ...................................................................................... 335
A-7
20.4 CPU Rewrite Mode ..................................................................................................... 337
20.4.1 EW Mode 0 .......................................................................................................... 338
20.4.2 EW Mode 1 .......................................................................................................... 338
20.5 Register Description ................................................................................................... 339
20.5.1 Flash Memory Control Register 0 (FMR0) ........................................................... 339
20.5.2 Flash Memory Control Register 1 (FMR1) ........................................................... 340
20.5.3 Flash Memory Control Register 4 (FMR4) ........................................................... 340
20.6 Precautions in CPU Rewrite Mode ............................................................................. 345
20.6.1 Operation Speed .................................................................................................. 345
20.6.2 Prohibited Instructions .......................................................................................... 345
20.6.3 Interrupts .............................................................................................................. 345
20.6.4 How to Access ...................................................................................................... 345
20.6.5 Writing in the User ROM Area .............................................................................. 345
20.6.6 DMA Transfer ....................................................................................................... 346
20.6.7 Writing Command and Data ................................................................................. 346
20.6.8 Wait Mode ............................................................................................................ 346
20.6.9 Stop Mode ............................................................................................................ 346
20.6.10 Low Power Consumption Mode and On-Chip Oscillator-Low Power Consumption Mode ... 346
20.7 Software Commands .................................................................................................. 347
20.7.1 Read Array Command (FF16)............................................................................... 347
20.7.2 Read Status Register Command (7016) ............................................................... 347
20.7.3 Clear Status Register Command (5016) ............................................................... 347
20.7.4 Program Command (4016) ................................................................................... 348
20.7.5 Block Erase .......................................................................................................... 349
20.8 Status Register ........................................................................................................... 351
20.8.1 Sequence Status (SR7 and FMR00 Bits ) ............................................................ 351
20.8.2 Erase Status (SR5 and FMR07 Bits) ................................................................... 351
20.8.3 Program Status (SR4 and FMR06 Bits) ............................................................... 351
20.8.4 Full Status Check ................................................................................................. 352
20.9 Standard Serial I/O Mode ........................................................................................... 354
20.9.1 ID Code Check Function ...................................................................................... 354
20.9.2 Example of Circuit Application in Standard Serial I/O Mode ................................ 358
20.10 Parallel I/O Mode ...................................................................................................... 360
20.10.1 ROM Code Protect Function .............................................................................. 360
20.11 CAN I/O Mode .......................................................................................................... 361
20.11.1 ID code check function ....................................................................................... 361
20.11.2 Example of Circuit Application in CAN I/O Mode ................................................ 365
A-8
21. Electrical Characteristics _____________________________________ 366
21.1 Normal version ........................................................................................................... 366
21.2 T version ..................................................................................................................... 387
21.3 V Version .................................................................................................................... 408
22. Usage Notes ______________________________________________ 421
22.1 SFRs ........................................................................................................................... 421
22.1.1 For 80-Pin Package ............................................................................................. 421
22.1.2 For 64-Pin Package ............................................................................................. 421
22.1.3 Register Setting .................................................................................................... 421
22.2 Clock Generation Circuit ............................................................................................. 422
22.2.1 PLL Frequency Synthesizer ................................................................................. 422
22.2.2 Power Control ...................................................................................................... 423
22.3 Protection ................................................................................................................... 425
22.4 Interrupts .................................................................................................................... 426
22.4.1 Reading Address 0000016 ..................................................................................................... 426
22.4.2 Setting the SP ...................................................................................................... 426
_______
22.4.3 NMI Interrupt ....................................................................................................... 426
22.4.4 Changing the Interrupt Generate Factor .............................................................. 426
______
22.4.5 INT Interrupt ......................................................................................................... 427
22.4.6 Rewrite the Interrupt Control Register .................................................................. 428
22.4.7 Watchdog Timer Interrupt ..................................................................................... 428
22.5 DMAC ......................................................................................................................... 429
22.5.1 Write to DMAE Bit in DMiCON Register ............................................................... 429
22.6 Timers ......................................................................................................................... 430
22.6.1 Timer A ................................................................................................................. 430
22.6.2 Timer B ................................................................................................................. 433
22.6.3 Three-phase Motor Control Timer Function ......................................................... 434
22.7 Timer S ....................................................................................................................... 435
22.7.1 Rewrite the G1IR Register .................................................................................. 435
22.7.2 Rewrite the ICOCiIC Register ............................................................................. 436
22.7.3 Waveform Generating Function .......................................................................... 436
22.7.4 IC/OC Base Timer Interrupt .................................................................................. 436
22.8 Serial I/O ..................................................................................................................... 437
22.8.1 Clock-Synchronous Serial I/O .............................................................................. 437
22.8.2 UART Mode.......................................................................................................... 438
22.8.3 SI/O3, SI/O4 ......................................................................................................... 438
A-9
22.9 A/D Converter ............................................................................................................. 439
22.10 Multi-Master I2C bus Interface ................................................................................. 441
22.10.1 Writing to the S00 Register ................................................................................ 441
22.10.2 AL Flag ............................................................................................................... 441
22.11 CAN Module ............................................................................................................. 442
22.11.1 Reading C0STR Register ................................................................................... 442
22.11.2 CAN Transceiver in Boot Mode .......................................................................... 444
22.12 Programmable I/O Ports ........................................................................................... 445
22.13 Electric Characteristic Differences Between Mask ROM .......................................... 446
22.14 Mask ROM Version ................................................................................................... 447
22.14.1 Internal ROM Area ............................................................................................. 447
22.14.2 Reserved Bit ....................................................................................................... 447
22.15 Flash Memory Version .............................................................................................. 448
22.15.1 Functions to Inhibit Rewriting Flash Memory Rewrite ........................................ 448
22.15.2 Stop Mode .......................................................................................................... 448
22.15.3 Wait Mode .......................................................................................................... 448
22.15.4 Low PowerDissipation Mode, On-Chip Oscillator Low Power Dissipation Mode .. 448
22.15.5 Writing Command and Data ............................................................................... 448
22.15.6 Program Command ............................................................................................ 448
22.15.7 Operation Speed ................................................................................................ 448
22.15.8 Instructions Inhibited Against Use ...................................................................... 448
22.15.9 Interrupts ............................................................................................................ 449
22.15.10 How to Access .................................................................................................. 449
22.15.11 Writing in the User ROM Area .......................................................................... 449
22.15.12 DMA Transfer ................................................................................................... 449
22.15.13 Regarding Programming/Erasure Times and Execution Time ......................... 449
22.15.14 Definition of Programming/Erasure Times ....................................................... 450
22.15.15 Flash Memory Version Electrical Characteristics 10,000 E/W cycle products
( Normal: U7, U9; T-ver./V-ver.: U7) ............................................. 450
22.15.16 Boot Mode ........................................................................................................ 450
22.16 Noise ........................................................................................................................ 451
22.17 Instruction for a Device Use ..................................................................................... 452
A-10
Appendix 1. Package Dimensions ________________________________ 453
Appendix 2. Functional Comparison _______________________________ 454
Appendix 2.1 Difference between M16C/28 Group and M16C/29 Group (Normal-ver.) .... 454
Appendix 2.2 Difference between M16C/28 and M16C/29 Group (T-ver./V-ver.) ............... 455
Register Index ________________________________________________ 456
A-11
Quick Reference to Pages Classified by Address
Address
Register
Symbol
Page
Address
000016
004016
000116
004116
000216
004216
000316
000416
000516
000616
000716
000816
000916
000A16
000B16
000C16
000D16
000E16
000F16
001016
001116
004316
Processor mode register 0
Processor mode register 1
System clock control register 0
System clock control register 1
PM0
PM1
CM0
CM1
44
44
49
50
Address match interrupt enable register
Protect register
AIER
PRCR
88
69
Oscillation stop detection register
CM2
51
004916
Watchdog timer start register
Watchdog timer control register
WDTS
WDC
90
90
004A16
Address match interrupt register 0
RMAD0
88
004416
004516
004616
004716
004816
004B16
004C16
004D16
001216
004E16
001316
001416
001516
Address match interrupt register 1
RMAD1
004F16
88
005016
001616
005116
001716
005216
001816
001916
001A16
001B16
001C16
001D16
001E16
001F16
002016
002116
Voltage detection register 1
Voltage detection register 2
VCR1
VCR2
41
41
PLL control register 0
PLC0
53
Processor mode register 2
Low voltage detection interrupt register
PM2
D4INT
52
42
DMA0 source pointer
SAR0
95
005316
005416
005516
005616
005716
005816
005916
005A16
005B16
005C16
002216
005D16
002316
005E16
002416
002516
DMA0 destination pointer
DAR0
005F16
95
006216
DMA0 transfer counter
TCR0
006316
95
002C16
DMA0 control register
DM0CON
006916
002F16
006A16
DMA1 source pointer
SAR1
006D16
006E16
DMA1 destination pointer
DAR1
006F16
95
007216
DMA1 transfer counter
TCR1
007316
95
CAN0 message box 1: Identifier/DLC
289
CAN 0 message box 1: Data field
289
CAN0 message box 1: Time stamp
289
007416
003A16
003C16
289
007116
003716
003B16
CAN0 message box 0: Time stamp
007016
003616
003916
289
006C16
003316
003816
CAN 0 message box 0: Data field
006B16
95
003216
003516
289
006716
006816
003416
CAN0 message box 0: Identifier/DLC
006616
94
002E16
003116
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
76
006516
002D16
003016
C01WKIC
C0RECIC
CAN0 successful transmission interrupt control regiser C0TRMIC
INT3 interrupt control register
INT3IC
IC/OC 0 interrupt control register
ICOC0IC
IC/OC 1 interrupt control register,
ICOC1IC
I2C bus interface interrupt control register IICIC
IC/OC base timer interrupt control register, BTIC
SCLSDA interrupt control register
SCLDAIC
SI/O4 interrupt control register,
S4IC
INT5 interrupt control register
INT5IC
SI/O3 interrupt control register,
S3IC
INT4 interrupt control register
INT4IC
UART2 Bus collision detection interrupt control register BCNIC
DMA0 interrupt control register
DM0IC
DMA1 interrupt control register
DM1IC
CAN0 error interrupt control register
C01ERRIC
A/D conversion interrupt control register
ADIC
Key input interrupt control register
KUPIC
UART2 transmit interrupt control register
S2TIC
UART2 receive interrupt control register
S2RIC
UART0 transmit interrupt control register
S0TIC
UART0 receive interrupt control register
S0RIC
UART1 transmit interrupt control register
S1TIC
UART1 receive interrupt control register
S1RIC
Timer A0 interrupt control register
TA0IC
Timer A1 interrupt control register
TA1IC
Timer A2 interrupt control register
TA2IC
Timer A3 interrupt control register
TA3IC
Timer A4 interrupt control register
TA4IC
Timer B0 interrupt control register
TB0IC
Timer B1 interrupt control register
TB1IC
Timer B2 interrupt control register
TB2IC
INT0 interrupt control register
INT0IC
INT1 interrupt control register
INT1IC
INT2 interrupt control register
INT2IC
CAN0 successful reception interrupt control register
006416
002A16
002B16
Page
006116
002716
002916
CAN0 wakeup interrupt control register
Symbol
006016
002616
002816
Register
007516
DMA1 control register
DM1CON
007616
94
007716
003D16
007816
003E16
007916
003F16
007A16
007B16
Note: The blank areas are reserved and cannot be accessed by users.
007C16
007D16
007E16
007F16
B-1
Quick Reference to Pages Classified by Address
Address
Register
Symbol
Page
Address
008016
00C016
008116
00C116
008216
008316
CAN0 message box 2: Identifier/DLC
00C216
289
00C316
008416
00C416
008516
00C516
008616
00C616
008716
00C716
008816
00C816
008916
008A16
CAN0 message box 2: Data field
00C916
289
00CA16
008B16
00CB16
008C16
00CC16
008F16
CAN0 message box 2: time stamp
00CE16
289
00CF16
CAN0 message box 3: Identifier/DLC
00D216
289
00D316
009416
00D416
009516
00D516
009616
00D616
009716
00D716
009A16
CAN0 message box 3: Data field
00D916
289
00DA16
009B16
00DB16
009C16
00DC16
009D16
00DD16
009E16
009F16
CAN0 message box 3: time stamp
00DE16
289
00DF16
00A016
00E016
00A116
00E116
00A216
00A316
CAN0 message box 4: Identifier/DLC
00E216
289
00E316
00A416
00E416
00A516
00E516
00A616
00E616
00A716
00E716
00A816
00E816
00A916
00AA16
CAN0 message box 4: Data field
00E916
289
00EA16
00AB16
00EB16
00AC16
00EC16
00AF16
CAN0 message box 4: time stamp
00EE16
289
00EF16
CAN0 message box 5: Identifier/DLC
00F216
289
00F316
00B416
00F416
00B516
00F516
00B616
00F616
00B716
00F716
00BA16
CAN0 message box 5: Data field
00F916
289
00FA16
00BB16
00FB16
00BC16
00FC16
00BD16
00FD16
00BE16
00BF16
289
CAN0 message box 7: Identifier/DLC
289
CAN0 message box 7: Data field
289
CAN0 message box 7: time stamp
289
CAN0 message box 8: Identifier/DLC
289
CAN0 message box 8: Data field
289
CAN0 message box 8: time stamp
289
CAN0 message box 9: Identifier/DLC
289
CAN0 message box 9: Data field
289
CAN0 message box 9: time stamp
289
00F816
00B816
00B916
CAN0 message box 6: time stamp
00F116
00B116
00B316
289
00F016
00B016
00B216
CAN0 message box 6: Data field
00ED16
00AD16
00AE16
289
00D816
009816
009916
CAN0 message box 6: Identifier/DLC
00D116
009116
009316
Page
00D016
009016
009216
Symbol
00CD16
008D16
008E16
Register
CAN0 message box 5: time stamp
00FE16
289
00FF16
Note: The blank areas are reserved and cannot be accessed by users.
B-2
Quick Reference to Pages Classified by Address
Address
Register
Symbol
Page
Address
010316
CAN0 message box 10: Identifer/DLC
014216
289
014316
010416
014416
010516
014516
010616
014616
010716
014716
010A16
CAN0 message box 10: Data field
014916
289
014A16
010B16
014B16
010C16
014C16
010F16
CAN0 message box 10: time stamp
014E16
289
014F16
011016
015016
011116
015116
011216
011316
CAN0 message box 11: Identifier/DLC
015216
289
015316
011416
015416
011516
015516
011616
015616
011716
015716
011A16
CAN0 message box 11: Data field
015916
289
015A16
011B16
015B16
011C16
015C16
011D16
015D16
011E16
011F16
CAN0 message box 11: time stamp
015E16
289
015F16
012016
016016
012116
016116
012216
012316
CAN0 message box 12: Identifier/DLC
016216
289
016316
012416
016416
012516
016516
012616
016616
012716
016716
012816
016816
012916
012A16
CAN0 message box 12: Data field
016916
289
016B16
012C16
016C16
CAN0 message box 12: time stamp
016E16
289
016F16
017016
013016
017116
013116
013216
013316
CAN0 message box 13: Identifier/DLC
017216
289
017316
013416
017416
013516
017516
013616
017616
013716
017716
017816
013816
013916
013A16
CAN0 message box 13: Data field
017916
289
017A16
013B16
017B16
013C16
017C16
013D16
017D16
013E16
013F16
289
CAN0 message box 14: time stamp
289
CAN0 message box 15: Identifier/DLC
289
CAN0 message box 15: Data field
289
CAN0 message box 15: time stamp
289
CAN0 global mask register
C0GMR
291
CAN0 local mask A register
C0LMAR
291
CAN0 local mask B register
C0LMBR
291
016D16
012D16
012F16
CAN0 message box 14: Data field
016A16
012B16
012E16
289
015816
011816
011916
CAN0 message box 14: Identifier/DLC
014D16
010D16
010E16
Page
014816
010816
010916
Symbol
014116
010116
010216
Register
014016
010016
CAN0 message box 13: time stamp
017E16
289
017F16
Note: The blank areas are reserved and cannot be accessed by users.
B-3
Quick Reference to Pages Classified by Address
Address
Register
Symbol
Page
Address
018016
024016
018116
024116
018216
024216
018316
024316
018416
024416
018516
024516
018616
024616
Register
Symbol
Page
CAN0 acceptance filter support register C0AFS
299
Three-phase protect control register
TPRC
139
025F16
0n-chip oscillator control register
Pin assignment control register
Peripheral clock select register
CAN0 clock select register
ROCR
PACR
PCLKR
CCLKR
02E016
I2C0 data shift register
S00
258
I2C0 address register
I2C0 control register 0
I2C0 clock control register
I2C0 start/stop condition control register
I2C0 control register 1
I2C0 control register 2
I2C0 status register
S0D0
S1D0
S20
S2D0
S3D0
S4D0
S10
257
259
258
263
261
262
260
024716
024816
024916
01B016
024A16
01B116
024C16
024D16
01B216
01B316
01B416
01B516
01B616
01B716
01B816
Flash memory control register 4
(Note 2)
FMR4
342
024E16
Flash memory control register 1
(Note 2)
FMR1
341
025016
Flash memory control register 0
(Note 2)
FMR0
341
025216
024F16
025116
025316
01B916
025416
01BA16
025516
01BB16
025616
01BC16
025716
025816
025916
025A16
020016
020116
020216
020316
020416
020516
020616
020716
020816
020916
020A16
020B16
020C16
020D16
020E16
020F16
021016
021116
021216
021316
021416
021516
021616
021716
021816
021916
021A16
021B16
021C16
021D16
021E16
021F16
CAN0 message control register 0
CAN0 message control register 1
CAN0 message control register 2
CAN0 message control register 3
CAN0 message control register 4
CAN0 message control register 5
CAN0 message control register 6
CAN0 message control register 7
CAN0 message control register 8
CAN0 message control register 9
CAN0 message control register 10
CAN0 message control register 11
CAN0 message control register 12
CAN0 message control register 13
CAN0 message control register 14
CAN0 message control register 15
C0MCTL0
C0MCTL1
C0MCTL2
C0MCTL3
C0MCTL4
C0MCTL5
C0MCTL6
C0MCTL7
C0MCTL8
C0MCTL9
C0MCTL10
C0MCTL11
C0MCTL12
C0MCTL13
C0MCTL14
C0MCTL15
292
292
292
292
292
292
292
292
292
292
292
292
292
292
292
292
CAN0 control register
C0CTLR
293
CAN0 status register
C0STR
294
CAN0 slot status register
C0SSTR
295
CAN 0 interrupt control register
C0ICR
296
CAN0 extended ID register
C0IDR
296
CAN0 configuration register
C0CONR
297
CAN0 receive error count register
CAN0 transmit error count register
C0RECR
C0TECR
298
298
CAN0 time stamp register
C0TSR
299
025B16
025C16
025D16
025E16
02E116
02E216
02E316
02E416
02E516
02E616
02E716
02E816
02E916
021016
02EA16
02FE16
02FE16
02FF16
02FF16
Note 1: The blank areas are reserved and cannot be accessed by users.
Note 2: This register is included in the flash memory version.
B-4
50
177, 326
52
53
Quick Reference to Pages Classified by Address
Register
Address
030016
030116
030216
030316
030416
030516
030616
030716
030816
030916
030A16
030B16
030C16
030D16
030E16
030F16
031016
031116
031216
031316
031416
031516
031616
031716
031816
031916
031A16
031B16
031C16
031D16
031E16
031F16
032016
032116
032216
032316
032416
032516
032616
032716
032816
032916
032A16
Symbol
Page
TM, WG register 0
G1TM0, G1PO0
146,147
TM, WG register 1
G1TM1, G1PO1
146,147
TM, WG register 2
G1TM2, G1PO2
146,147
TM, WG register 3
G1TM3, G1PO3
146,147
Address
034216
034316
034416
034516
034616
034716
034816
TM, WG register 4
G1TM4, G1PO4
146,147
TM, WG register 5
G1TM5, G1PO5
146,147
TM, WG register 6
G1TM6, G1PO6
146,147
TM, WG register 7
G1TM7, G1PO7
146,147
WG control register 0
WG control register 1
WG control register 2
WG control register 3
WG control register 4
WG control register 5
WG control register 6
WG control register 7
TM control register 0
TM control register 1
TM control register 2
TM control register 3
TM control register 4
TM control register 5
TM control register 6
TM control register 7
G1POCR0
G1POCR1
G1POCR2
G1POCR3
G1POCR4
G1POCR5
G1POCR6
G1POCR7
G1TMCR0
G1TMCR1
G1TMCR2
G1TMCR3
G1TMCR4
G1TMCR5
G1TMCR6
G1TMCR7
146
146
146
146
146
146
146
146
145
145
145
145
145
145
145
145
Base timer register
G1BT
142
036016
Base timer control register 0
Base timer control register 1
TM prescale register 6
TM prescale register 7
Function enable register
Function select register
G1BCR0
G1BCR1
G1TPR6
G1TPR7
G1FE
G1FS
142
143
145
145
148
148
036216
Base timer reset register
G1BTRR
144
036816
Divider register
G1DV
143
036A16
034916
034A16
034B16
034C16
034E16
TA21
130
Timer A4-1 register
TA41
130
Three-phase PWM control register 0
Three-phase PWM control register 1
Three-phase output buffer register 0
Three-phase output buffer register 1
Dead time timer
Position-data-retain function contol register
INVC0
INVC1
IDB0
IDB1
DTT
ICTB2
PDRF
127
128
129
129
129
129
137
Port function control register
PFCR
139
Interrupt request cause select register 2
Interrupt request cause select register
SI/O3 transmit/receive register
IFSR2A
IFSR
S3TRR
77
77, 85
218
SI/O3 control register
SI/O3 bit rate generator
SI/O4 transmit/receive register
S3C
S3BRG
S4TRR
218
218
218
SI/O4 control register
SI/O4 bit rate generator
S4C
S4BRG
218
218
UART2 special mode register 4
UART2 special mode register 3
UART2 special mode register 2
UART2 special mode register
UART2 transmit/receive mode register
UART2 bit rate generator
U2SMR4
U2SMR3
U2SMR2
U2SMR
U2MR
U2BRG
179
179
178
178
175
174
UART2 transmit buffer register
U2TB
174
U2C0
U2C1
176
177
U2RB
174
035216
035316
035416
035516
035616
035716
035816
035916
035A16
035B16
035C16
035D16
035E16
035F16
036116
036316
036416
036516
036616
036716
036916
036D16
036E16
033216
Timer A2-1 register
035116
032E16
033116
130
035016
036C16
149
150
150
TA11
034F16
032D16
G1IR
G1IE0
G1IE1
Timer A1-1 register
034D16 Timer B2 interrupt occurrence frequency set counter
036B16
Interrupt request register
Interrupt enable register 0
Interrupt enable register 1
036F16
037016
037116
037216
033316
037316
033416
037416
033516
037516
033616
037616
033716
037716
033816
037816
033916
037916
033A16
037A16
033B16
037B16
033C16
037C16 UART2 transmit/receive control register 0
033D16
037D16 UART2 transmit/receive control register 1
033E16
033F16
NMI digital debounce register
P17 digital debounce register
NDDR
P17DDR
327
327
Page
034116
032C16
033016
Symbol
034016
032B16
032F16
Register
037E16
037F16
Note : The blank areas are reserved and cannot be accessed by users.
B-5
UART2 receive buffer register
Quick Reference to Pages Classified by Address
Register
Address
038016
Symbol
Page
104, 118,
132
03C016
Count start flag
TABSR
Clock prescaler reset flag
One-shot start flag
Trigger select register
Up-down flag
CPSRF
ONSF
TRGSR
UDF
Timer A0 register
TA0
104
03C716
Timer A1 register
TA1
104
03C916
Timer A2 register
TA2
104
03CB16
Timer A3 register
TA3
104
03CD16
Timer A4 register
TA4
104
03CF16
Timer B0 register
TB0
118
03D116
Timer B1 register
TB1
118
03D316
Timer B2 register
TB2
118
03D516
Timer A0 mode register
Timer A1 mode register
Timer A2 mode register
Timer A3 mode register
Timer A4 mode register
Timer B0 mode register
Timer B1 mode register
Timer B2 mode register
Timer B2 special mode register
TA0MR
TA1MR
TA2MR
TA3MR
TA4MR
TB0MR
TB1MR
TB2MR
TB2SC
103
133
133
103
133
117
117
133
131
03D716
UART0 transmit/receive mode register
03A116
UART0 bit rate generator
U0MR
U0BRG
175
174
03A216
UART0 transmit buffer register
U0TB
174
03E316
UART0 transmit/receive control register 0
UART0 transmit/receive control register 1
U0C0
U0C1
176
177
03E516
UART0 receive buffer register
U0RB
174
03E716
UART1 transmit/receive mode register
UART1 bit rate generator
175
174
03E916
03A916
U1MR
U1BRG
03AA16
UART1 transmit buffer register
U1TB
174
03EB16
U1C0
U1C1
176
177
03ED16
UART1 receive buffer register
U1RB
174
03EF16
UART transmit/receive control register 2
UCON
176
03F116
038116
038216
038316
038416
105,118
105
105,132
104
038716
038816
038916
038A16
038B16
038C16
038D16
038E16
038F16
039016
039116
039216
039316
039416
039516
039616
039716
039816
039916
039A16
039B16
039C16
039D16
039E16
039F16
03A016
03A316
03A416
03A516
03A616
03A716
03A816
03AB16
03AC16 UART1 transmit/receive control register 0
03AD16 UART1 transmit/receive control register 1
03AE16
03AF16
03B016
03C116
03C216
03C316
03C416
03C516
03C616
038516
038616
03C816
03CA16
03CC16
03CE16
03D216
03D416
03D616
03B916
03BA16
03BD16
03BE16
A/D register 1
AD1
226
A/D register 2
AD2
226
A/D register 3
AD3
226
A/D register 4
AD4
226
A/D register 5
AD5
226
A/D register 6
AD6
226
A/D register 7
AD7
226
A/D trigger control register
A/D convert status register 0
A/D control register 2
ADTRGCON
ADSTAT0
ADCON2
225
226
224
A/D control register 0
A/D control register 1
ADCON0
ADCON1
224
224
Port P0 register
Port P1 register
Port P0 direction register
Port P1 direction register
Port P2 register
Port P3 register
Port P2 direction register
Port P3 direction register
P0
P1
PD0
PD1
P2
P3
PD2
PD3
324
324
323
323
324
324
323
323
Port P6 register
Port P7 register
Port P6 direction register
Port P7 direction register
Port P8 register
Port P9 register
Port P8 direction register
Port P9 direction register
Port P10 register
P6
P7
PD6
PD7
P8
P9
PD8
PD9
P10
324
324
323
323
324
324
323
323
324
Port P10 direction register
PD10
323
Pull-up control register 0
Pull-up control register 1
Pull-up control register 2
Port control register
PUR0
PUR1
PUR2
PCR
325
325
325
326
03DC16
03DD16
03DE16
03DF16
03E016
03E116
03E216
03E416
03E616
03E816
03EA16
03EC16
03EE16
03F016
03F416
CRC snoop address register
CRCSAR
314
03F516
CRC mode register
CRCMR
314
03F716
DMA0 request cause select register
DM0SL
93
DMA1 request cause select register
DM1SL
94
CRC data register
CRCD
314
03FD16
CRC input register
CRCIN
314
03FF16
03F616
03F816
03F916
03FA16
03FB16
03FC16
03BB16
03BC16
226
03DB16
03F316
03B816
AD0
03DA16
03B316
03B716
A/D register 0
03D916
03F216
03B616
Page
03D816
03B216
03B516
Symbol
03D016
03B116
03B416
Register
Address
03FE16
03BF16
Note : The blank areas are reserved and cannot be accessed by users.
B-6
M16C/29 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
1. Overview
1.1 Features
The M16C/29 Group of single-chip control MCU incorporates the M16C/60 series CPU core, employing the
high-performance silicon gate CMOS technology and sophisticated instructions for a high level of efficiency. The M16C/29 Group is housed in 64-pin and 80-pin plastic molded LQFP packages. These singlechip MCUs operate using sophisticated instructions featuring a high level of instruction efficiency. This
MCU is capable of executing instructions at high speed and it has one CAN module, makes it suitable for
control of cars and LAN system of FA. In addition, the CPU core boasts a multiplier and DMAC for highspeed processing to make adequate for office automation, communication devices, and other high-speed
processing applications.
1.1.1 Applications
Automotive body, car audio, LAN system of FA, etc.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 1 of 458
1. Overview
M16C/29 Group
1.1.2 Specifications
Table 1.1 lists performance overview of M16C/29 Group 80-pin package.
Table 1.2 lists performance overview of M16C/29 Group 64-pin package.
Table 1.1 Performance Overview of M16C/29 Group (T-ver./V-ver.) (80-Pin Package)
Item
Performance
CPU
Number of basic instructions
91 instructions
Shortest instruction
50 ns (f(BCLK) = 20MHZ, VCC = 3.0 to 5.5 V)
(Normal-ver./T-ver.)
excution time
100 ns(f(BCLK) = 10MHZ, VCC = 2.7 to 5.5 V)
(Normal-ver.)
50 ns (f(BCLK) = 20MHZ, VCC = 4.2 to 5.5 V, -40 to 105°C) (V-ver.)
62.5 ns (f(BCLK) = 16MHZ, VCC = 4.2 to 5.5 V, -40 to 125°C) (V-ver.)
Operation mode
Single chip mode
Address space
1 Mbyte
Memory capacity
ROM/RAM: See Tables 1.3 to 1.5
Peripheral Port
Input/Output: 71 lines
Function Multifunction timer
TimerA:16 bits x 5 channels, TimerB:16 bits x 3 channels
Three-phase Motor Control Timer
TimerS (Input Capture/Output Compare):
16 bit base timer x 1 channel (Input/Output x 8 channels)
Serial I/O
2 channels (UART, clock synchronous serial I/O)
1 channel (UART, clock synchronous serial I/O, I2C bus, or IEbus(1))
2 channels (Clock synchronous serial I/O)
1 channel (Multi- master I2C bus)
A/D converter
10 bits x 27 channels
DMAC
2 channels
CRC calculation circuit
2 polynomial (CRC-CCITT and CRC-16) with MSB/LSB selectable
CAN module
1 channel, supporting CAN 2.0B specification
Watchdog timer
15 bits x 1 channel (with prescaler)
Interrupt
29 internal and 8 external sources, 4 software sources,
interrupt priority level: 7
Clock generation circuit
4 circuits
• Main clock  (These circuits contain a built-in feedback

• Sub-clock  resistor)
• On-chip oscillator(main-clock oscillation stop detect function)
• PLL frequency synthesizer
Oscillation stop detect Function Main clock oscillation stop, re-oscillation detect function
Voltage detection circuit
Available (Normal-ver.) / Not available (T-ver., V-ver.)
Electrical Power supply voltage
VCC = 3.0 to 5.5 V (f(BCLK) = 20 MHz) (Normal-ver.)
CharactVCC = 2.7 to 5.5 V (f(BCLK) = 10 MHz)
eristics
VCC = 3.0 to 5.5 V (T-ver.)
VCC = 4.2 to 5.5 V (V-ver.)
Power consumption
18 mA (VCC = 5 V, f(BCLK) = 20 MHz)
25 µA (f(XCIN) = 32 kHz on RAM)
3 µA (VCC = 5 V, f(XCIN) = 32 kHz, in wait mode)
0.8 µA (VCC = 5 V, in stop mode)
Flash
Program/erase supply voltage
2.7 to 5.5 V (Normal-ver.), 3.0 to 5.5V (T-ver.), 4.2 to 5.5 V (V-ver.)
memory Program and erase endurance
100 times (all space) or 1,000 times (blocks 0 to 5)/
10,000 times (blocks A and B(2))
Operating ambient temperature
-20 to 85°C/-40 to 85°C(2) (Normal-ver.)
-40 to 85°C (T-ver.), -40 to 125°C (V-ver.)
Package
80-pin plastic mold LQFP
NOTES:
1. IEBus is a trademark of NEC Electronics Corporation.
2. Refer to Table 1.6 to Table 1.8 Product code.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 2 of 458
1. Overview
M16C/29 Group
Table 1.2 Performance Overview of M16C/29 Group (64-Pin Package)
Item
Performance
CPU Number of basic instructions
91 instructions
Shortest instruction
50 ns (f(BCLK) = 20MHZ, VCC = 3.0 to 5.5 V)
(Normal-ver./T-ver.)
excution time
100 ns(f(BCLK) = 10MHZ, VCC = 2.7 to 5.5 V)
(Normal-ver.)
50 ns (f(BCLK) = 20MHZ, VCC = 4.2 to 5.5 V, -40 to 105°C) (V-ver.)
62.5 ns (f(BCLK) = 16MHZ, VCC = 4.2 to 5.5 V, -40 to 125°C) (V-ver.)
Operation mode
Single chip mode
Address space
1 Mbytes
Memory capacity
ROM/RAM: See Tables 1.3 to 1.5
Peripheral Port
Input/Output: 55 lines
function Multifunction timer
TimerA:16 bits x 5 channels, TimerB:16 bits x 3 channels
Three-phase Motor Control Timer
TimerS (Input Capture/Output Compare):
16bit base timer x 1 channel (Input/Output x 8 channels )
Serial I/O
2 channels (UART, clock synchronous serial I/O)
1 channel (UART, clock synchronous serial I/O, I2C bus, or IEbus(1) )
1 channel (Clock synchronous serial I/O)
1 channel (Multi-master I2C bus)
A/D converter
10 bits x 16 channels
DMAC
2 channels
CRC calculation circuit
2 polynomial (CRC-CCITT and CRC-16) with MSB/LSB selectable
CAN module
1 channel, supporting CAN 2.0B specification
Watchdog timer
15 bits x 1 channel (with prescaler)
Interrupt
28 internal and 8 external sources, 4 software sources,
interrupt priority level: 7
Clock generation circuit
4 circuits
• Main clock  (These circuits contain a built-in feedback

• Sub-clock  resistor)
• On-chip oscillator(main-clock oscillation stop detect function)
• PLL frequency synthesizer
Oscillation stop detect function Main clock oscillation stop, re-oscillation detect function
Voltage detection circuit
Available (Normal-ver.) / Not available (T-ver., V-ver.)
Electrical Power supply voltage
VCC = 3.0 to 5.5 V (f(BCLK) = 20 MHz) (Normal-ver.)
CharactVCC = 2.7 to 5.5 V (f(BCLK) = 10 MHz)
eristics
VCC = 3.0 to 5.5 V (T-ver.)
VCC = 4.2 to 5.5 V (V-ver.)
Power consumption
18 mA (VCC = 5 V, f(BCLK) = 20 MHz)
25 µA (f(XCIN) = 32 kHz on RAM)
3 µA (VCC = 5 V, f(XCIN) = 32 kHz, in wait mode)
0.8 µA (VCC = 5 V, in stop mode)
Flash
Program/erase supply voltage
2.7 to 5.5 V (Normal-ver.), 3.0 to 5.5V (T-ver.), 4.2 to 5.5 V (V-ver.)
memory Program and erase endurance
100 times (all space) or 1,000 times (blocks 0 to 5)/
10,000 times (blocks A and B(2))
Operating ambient temperature
-20 to 85°C/-40 to 85°C(2) (Normal-ver.)
-40 to 85°C (T-ver.), -40 to 125°C (V-ver.)
Package
64-pin plastic mold LQFP
NOTES:
1. IEBus is a trademark of NEC Electronics Corporation.
2. Refer to Table 1.6 to Table 1.8 Product code.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 3 of 458
1. Overview
M16C/29 Group
1.2 Block Diagram
Figure 1.1 is a block diagram of the M16C/29 Group, 80-pin package.
8
I/O Ports
Port P0
8
8
Port P1
Port P2
8
Port P3
Port P6
8
XIN-XOUT
XCIN-XCOUT
On-chip oscillator
PLL frequency synthesizer
Port P7
8
CRC calculation circuit
(CCITT, CRC-16)
Port P8
8
Internal Peripheral Functions
Timer (16 bits)
UART/clock synchronous SI/O
(8 bits x 3 channels)
Output (Timer A) : 5
Input (Timer B) : 3
Clock synchronous SI/O
(8 bits x 2 channels)
3-phase PWM
Multi-master I2C bus
Timer S
Input capture/
Output compare
Time measurement : 8 channels
Waveform generating : 8 channels
(
System clock generator
)
CAN module
(1 channel)
M16C/60 Series CPU Core
USP
ISP
INTB
ROM(1)
RAM(2)
PC
FLG
NOTES:
1. The ROM capacity varies depending on each product.
2. The RAM capacity varies depending on each product.
Figure 1.1 M16C/29 Group, 80-Pin Block Diagram
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 4 of 458
8
Multiplier
DMAC
(2 channels)
7
A0
A1
FB
SB
Port P10
Watchdog timer
(15 bits)
R2
R3
R0L
R1L
Port P9
R0H
R1H
A/D converter
(1 0 b its x 2 7 c h a n n e ls )
Memory
1. Overview
M16C/29 Group
Figure 1.2 is a block diagram of the M16C/29 Group, 64-pin package.
4
I/O Ports
Port P0
3
8
Port P1
Port P2
4
Port P3
A0
A1
FB
ROM(1)
USP
ISP
RAM(2)
INTB
PC
FLG
Multiplier
NOTES:
1. The ROM capacity varies depending on each product.
2. The RAM capacity varies depending on each product.
Figure 1.2 M16C/29 Group, 64-Pin Block Diagram
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 5 of 458
8
DMAC
(2 channels)
SB
4
R2
R3
R0L
R1L
8
R0H
R1H
Memory
Port P10
Watchdog timer
(15 bits)
M16C/60 Series CPU Core
Port P9
A/D converter
(10 bits x 16 channels)
CRC calculation circuit
(CRC-CCITT, CRC16)
8
)
(
CAN module
(1 channel)
8
Timer S
Input capture/
Output compare
Time measurement : 8 channels
Waveform generating : 8 channels
Multi-master I2C bus
System clock generator
XIN-XOUT
XCIN-XCOUT
On-chip oscillator
PLL frequency synthesizer
Port P8
3-phase PWM
UART/Clock synchronous SI/O
(8 bits x 3 channels)
Clock synchronous SI/O
(8 bits x 1 channel)
Port P7
Timer (16 bits)
Output (Timer A) : 5
Input (Timer B) : 3
Port P6
Internal Peripheral Functions
1. Overview
M16C/29 Group
1.3 Product List
Tables 1.3 to 1.5 list the M16C/29 Group products and Figure 1.3 shows the type numbers, memory sizes
and packages. Tables 1.6 to 1.8 list the product code of flash memory version for M16C/29 Group. Figure
1.4 to Figure 1.6 show the marking diagram of flash memory version for M16C/29 Group.
Table 1.3 Product List (1) -Normal Version
As of March, 2007
ROM
Capacity
RAM
Capacity
M30290FAHP
96 K + 4 K
8K
M30290FCHP
128 K + 4 K
12 K
M30291FAHP
96 K + 4 K
8K
M30291FCHP
128 K + 4 K
12 K
M30290M8-XXXHP
64 K
4K
M30290MA-XXXHP
96 K
8K
M30290MC-XXXHP
128 K
12 K
M30291M8-XXXHP
64 K
4K
M30291MA-XXXHP
96 K
8K
M30291MC-XXXHP
128 K
12 K
Type Number
Package Type
PLQP0080KB-A (80P6Q-A)
PLQP0064KB-A (64P6Q-A)
RAM
Capacity
M30290FATHP
96 K + 4 K
8K
M30290FCTHP
128 K + 4 K
12 K
M30291FATHP
96 K + 4 K
8K
M30291FCTHP
128 K + 4 K
12 K
M30290M8T-XXXHP
64 K
4K
M30290MAT-XXXHP
96 K
8K
M30290MCT-XXXHP
128 K
12 K
M30291M8T-XXXHP
64 K
4K
M30291MAT-XXXHP
96 K
8K
M30291MCT-XXXHP
128 K
12 K
page 6 of 458
Flash
Memory
U3, U5,
U7, U9
Mask
ROM
U3, U5
PLQP0064KB-A (64P6Q-A)
As of March, 2007
ROM
Capacity
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
Product
Code
PLQP0080KB-A (80P6Q-A)
Table 1.4 Product List (2) -T Version
Type Number
Remarks
Package Type
PLQP0080KB-A (80P6Q-A)
PLQP0064KB-A (64P6Q-A)
Remarks
Product
Code
Flash
Memory
U3, U5,
U7, U9
Mask
ROM
U0
PLQP0080KB-A (80P6Q-A)
PLQP0064KB-A (64P6Q-A)
1. Overview
M16C/29 Group
Table 1.5 Product List (3) -V Version
As of March, 2007
ROM
Capacity
RAM
Capacity
M30290FAVHP
96 K + 4 K
8K
M30290FCVHP
128 K + 4 K
12 K
M30291FAVHP
96 K + 4 K
8K
M30291FCVHP
128 K + 4 K
12 K
M30290M8V-XXXHP
64 K
4K
M30290MAV-XXXHP
96 K
8K
M30290MCV-XXXHP
128 K
12 K
M30291M8V-XXXHP
64 K
4K
M30291MAV-XXXHP
96 K
8K
M30291MCV-XXXHP
128 K
12 K
Type Number
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 7 of 458
Package Type
PLQP0080KB-A (80P6Q-A)
PLQP0064KB-A (64P6Q-A)
Remarks
Product
Code
Flash
Memory
U3, U5,
U7, U9
Mask
ROM
U0
PLQP0080KB-A (80P6Q-A)
PLQP0064KB-A (64P6Q-A)
1. Overview
M16C/29 Group
Type No. M 3 0 2 9 0 F A T H P - U3
Product Code
See Tables 1.6 and 1.9 for Normal-ver., Tables 1.7
and 1.10 for T-ver., and Tables 1.8 and 1.11 for V-ver..
Package type:
HP = Package PLQP0080KB-A (80P6Q-A)
Package PLQP0064KB-A (64P6Q-A)
Version
Blank: Normal-version
T: T-version
V: V-version
ROM capacity /RAM capacity:
8: (64 K) bytes/4 K bytes
A: (96 K+4 K) bytes(1)/8 K bytes
C: (128 K+4 K) bytes(1)/12 K bytes
NOTE:
1. "+4 K bytes" is needed only in flash memory version.
Memory type:
M: Mask ROM version
F: Flash memory version
Pin count
0: 80-pin package
1: 64-pin package
M16C/29 Group
M16C Family
Figure 1.3 Type No., Memory Size, and Package
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 8 of 458
1. Overview
M16C/29 Group
Table 1.6 Product Codes of Flash Memory Version
Product
Code
Internal ROM
(User Program Space: Blocks 0 to 5)
Package
Program
and Erase
Endurance
U3
Temperature Range
100
U5
Lead-free
U7
10,000
Table 1.7 Product Codes of Flash Memory Version
U3
Internal ROM
(User Program Space: Blocks 0 to 5)
Program
and Erase
Endurance
100
Lead-free
U7
1,000
Temperature Range
U3
Package
Program
and Erase
Endurance
100
Lead-free
U7
1,000
Temperature Range
0 to 60ºC
Table 1.9 Product Codes of Mask ROM Version
Product
Code
U3
U5
Lead-free
Package
Operating Ambient
Temperature
U0
Lead-free
-40 to 85ºC
Table 1.11 Product Code of Mask ROM Version
Product
Code
Package
Operating Ambient
Temperature
U0
Lead-free
-40 to 125ºC
page 9 of 458
-20 to 85ºC
-20 to 85ºC
-20 to 85ºC
Program
and Erase
Endurance
Temperature
Range
-40 to 85ºC
Operating Ambient
Temperature
-40 to 85ºC
-M16C/29 Group, V-ver.
Internal ROM
(Data Space: Blocks A and B)
Program
and Erase
Endurance
100
10,000
Temperature
Range
-40 to 125ºC
-M16C/29 Group, Normal-ver.
-20 to 85ºC
Product
Code
-40 to 85ºC
-40 to 85ºC
-40 to 85ºC
Table 1.10 Product Code of Mask ROM Version
Operating Ambient
Temperature
-40 to 85ºC
Operating Ambient
Temperature
Package
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
0 to 60ºC
Internal ROM
(Data Space: Blocks A and B)
10,000
Internal ROM
(User Program Space: Blocks 0 to 5)
Temperature
Range
-M16C/29 Group, T-ver.
100
0 to 60ºC
Table 1.8 Product Codes of Flash Memory Version
Product
Code
Program
and Erase
Endurance
0 to 60ºC
U9
Package
Internal ROM
(Data Space: Blocks A and B)
100
1,000
Product
Code
-M16C/29 Group, Normal-ver.
-M16C/29 Group, T-ver.
-M16C/29 Group, V-ver.
Operating
Ambient
Temperature
-40 to 125ºC
1. Overview
M16C/29 Group
(1) Flash Memory Version, PLQP0080KB-A (80P6Q-A), Normal-ver.
M16C
M30290FAHP
A U3
XXXXXXX
Product Name: indicates M30290FAHP
Chip Version and Product Code:
A: indicates chip version
The first edition is shown to be blank and continues with A and B.
U3: indicates product code (see Table 1.6)
Date Code (7 digits): indicates manufacturing management code
(2) Flash Memory Version, PLQP0064KB-A (64P6Q-A), Normal-ver.
30291FA
A U3
XXXXXXX
Product Name: indicates M30291FAHP
Chip Version and Product Code:
A: indicates chip version
The first edition is shown to be blank and continues with A and B.
U3: indicates product code (see Table 1.6)
Date Code (7 digits): indicates manufacturing management code
Figure 1.4 Marking Diagrams of Flash Memory Version - M16C/29 Group Normal-ver. (Top View)
(1) Flash Memory Version, PLQP0080KB-A (80P6Q-A), T-ver.
M16C
M30290FATHP
A U3
XXXXXXX
Product Name : indicates M30290FATHP
Chip Version and Product Code:
A : indicates chip version
The first edition is shown to be blank and continues with A and B.
U3 : indicates product code (see Table 1.7)
Date Code (7 digits) : indicates manufacturing management code
(2) Flash Memory Version, PLQP0064KB-A (64P6Q-A), T-ver.
A U3
M30291FATHP
XXXXXXX
Chip Version and Product Code:
A : indicates chip version
The first edition is shown to be blank and continues with A and B.
U3 : indicates product code (see Table 1.7)
Product Name : indicates M30291FATHP
Date Code (7 digits) : indicates manufacturing management code
Figure 1.5 Marking Diagrams of Flash Memory Version - M16C/29 Group T-ver. (Top View)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 10 of 458
1. Overview
M16C/29 Group
(1) Flash Memory Version, PLQP0080KB-A (80P6Q-A), V-ver.
M16C
M30290FAVHP
A U3
XXXXXXX
Product Name: indicates M30290FAVHP
Chip Version and Product Code:
A: indicates chip version
The first edition is shown to be blank and continues with A and B.
U3: indicates product code (see Table 1.8)
Date Code (7 digits): indicates manufacturing management code
(2) Flash Memory Version, PLQP0064KB-A (64P6Q-A), V-ver.
A U3
M30291FAVHP
XXXXXXX
Chip Version and Product Code:
A: indicates chip version
The first edition is shown to be blank and continues with A and B.
U3: indicates product code (see Table 1.8)
Product Name: indicates M30291FAVHP
Date Code (7 digits): indicates manufacturing management code
Figure 1.6 Marking Diagrams of Flash Memory Version - M16C/29 Group V-ver. (Top View)
(1) Mask ROM Version, PLQP0080KB-A (80P6Q-A), Normal-ver.
M16C
M30290MAXXXHP A U5
XXXXXXX
Type No. M30290MAHP
Chip version and product code
XXX : ROM No.
A : Chip version and product code(1)
The first edition is shown to be blank and continues with A, B and C.
U5 : Product code. (Table 1.9)
Date code seven digits
Manufacturing management code
(2) Mask ROM Version, PLQP0064-KB-A (64P6Q-A), Normal-ver.
XXXXXXX
M30291MAXXXHP A U5
Date code seven digits
Manufacturing management code
Type No. M30291MAHP
Chip version and product code
XXX: ROM No.
A : Chip version and product code(1)
The first edition is shown to be blank and continues with A, B and C.
U5 : Product code. (Table 1.9)
Figure 1.7 Marking Diagrams of Mask ROM Version - M16C/29 Group Normal-ver. (Top View)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 11 of 458
1. Overview
M16C/29 Group
1.4 Pin Assignments
P61/CLK0
P62/RxD0
P60/CTS0/RTS0
P25/OUTC15/INPC15
P26/OUTC16/INPC16
P27/OUTC17/INPC17
P24/OUTC14/INPC14
P23/OUTC13/INPC13
P22/OUTC12/INPC12
P21/OUTC11/INPC11/SCLMM
P17/INT5/INPC17/IDU
P20/OUTC10/INPC10/SDAMM
P14
P15/INT3/ADTRG/IDV
P16/INT4/IDW
P12/AN22
P13/AN23
P07/AN07
P10/AN20
P11/AN21
Figures 1.7 and 1.8 show the pin assignments (top view).
60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
P06/AN06
P05/AN05
P04/AN04
P03/AN03
61
40
62
39
63
38
64
37
P02/AN02
65
36
P01/AN01
P00/AN00
P107/AN7/KI3
P106/AN6/KI2
P105/AN5/KI1
P104/AN4/KI0
P103/AN3
P102/AN2
P101/AN1
AVSS
P100/AN0
VREF
AVcc
P97/AN27/SIN4
P96/AN26/SOUT4
66
M16C/29 Group (M16C/29)
67
68
34
33
32
69
PLQP0080KB-A
(80P6Q-A)
(top view)
70
71
72
73
74
75
31
30
29
28
27
26
23
79
22
80
21
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18 19 20
RESET
XOUT
VSS
XIN
VCC
P85/NMI/SD
P84/INT2/ZP
P83/INT1
P82/INT0
P81/TA4IN/U
P80/TA4OUT/U
P77/TA3IN
1
P92/AN32/TB2IN/CRX
P91/AN31/TB1IN
P90/AN30/TB0IN/CLKOUT
CNVss
P87/XCIN
P86/XCOUT
24
78
P93/AN24/CTX
25
77
P95/AN25/CLK4
76
NOTE:
1.Set bits PACR2 to PACR0 in the PACR register to "0112" before
signals are input or output to individual pins after reset. When the
PACR register is not set, signals are not input or output for some
Figure 1.8 Pin Assignment (Top View) of 80-Pin Package
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
35
page 12 of 458
P63/TXD0
P30/CLK3
P31/SIN3
P32/SOUT3
P33
P34
P35
P36
P37
P64/CTS1/RTS1/CTS0/CLKS1
P65/CLK1
P66/RxD1
P67/TXD1
P70/TXD2/SDA2/TA0OUT/CTS1/RTS1/CTS0/CLKS1
P71/RXD2/SCL2/TA0IN/CLK1
P72/CLK2/TA1OUT/V/RxD1
P73/CTS2/RTS2/TA1IN/V/TxD1
P74/TA2OUT/W
P75/TA2IN/W
P76/TA3OUT
1. Overview
M16C/29 Group
Table 1.12 Pin Characteristics for 80-Pin Package
Pin
No.
Control
Pin
Port
Interrupt
Pin
Timer Pin
Timer S Pin
UART/CAN Pin
Multi-master
I2C bus Pin
Analog Pin
1
P95
2
P 93
3
P 92
TB2IN
4
P 91
TB1IN
AN31
P90
TB0IN
AN30
5
CLKOUT
6
CNVss
7
XCIN
P87
8
XCOUT
P86
9
RESET
10
XOUT
11
Vss
12
XIN
13
Vcc
14
P 85
NMI
SD
15
P84
INT2
ZP
16
P8 3
INT1
17
P 82
INT0
18
P 81
TA4IN / U
CLK4
AN25
CTX
AN24
CRX
AN32
19
P80
TA4OUT / U
20
P77
TA3IN
21
P 76
TA3OUT
22
P 75
TA2IN / W
23
P74
TA2OUT / W
24
P73
TA1IN / V
CTS2 / RTS2 / TXD1
25
P 72
TA1OUT / V
CLK2 / RXD1
26
P 71
TA0IN
RXD2 / SCL2 / CLK1
27
P 70
TA0OUT
TXD2 / SDA2 / RTS1 /
CTS1 / CTS0 / CLKS1
28
P 67
TXD1
29
P 66
RX D1
30
P 65
CLK1
RTS1 / CTS1/ CTS0 /
CLKS1
31
P 64
32
P 37
33
P 36
34
P 35
35
P 34
36
P 33
37
P 32
SOUT3
38
P 31
SIN3
39
P 30
CLK3
40
P 63
TXD0
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 13 of 458
1. Overview
M16C/29 Group
Table 1.12 Pin Characteristics for 80-Pin Package (continued)
Pin
No.
Control
Pin
Port
Interrupt
Pin
Timer Pin
Timer S Pin
UART/CAN Pin
Multi-master
I2C bus Pin
41
P62
RXD0
42
P61
CLK0
43
P60
RTS0 / CTS0
44
P27
OUTC17 / INPC17
45
P26
OUTC16 / INPC16
46
P25
OUTC15 / INPC15
47
P24
OUTC14 / INPC14
48
P23
OUTC13 / INPC13
49
P22
OUTC12 / INPC12
50
P21
OUTC11 / INPC11
SCLMM
51
P20
OUTC10 / INPC10
SDAMM
Analog Pin
52
P17
INT5
IDU
53
P16
INT4
IDW
INPC17
54
P15
INT3
IDV
55
P14
56
P13
AN23
57
P12
AN22
58
P11
AN21
59
P10
AN20
60
P07
AN07
61
P06
AN06
62
P05
AN05
63
P04
AN04
64
P03
AN03
ADTRG
65
P02
AN02
66
P01
AN01
67
P00
AN00
68
P107 KI3
AN7
69
P106 KI2
AN6
70
P105 KI1
AN5
71
P104 KI0
AN4
72
P103
AN3
73
P102
AN2
74
P101
AN1
P100
AN0
75 AVss
76
77 VREF
78 AVcc
79
P97
SIN4
AN27
80
P96
SOUT4
AN26
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 14 of 458
1. Overview
P61/CLK0
P62/RxD0
P63/TxD0
33
36
34
P60/CTS0/RTS0
37
35
P26/OUTC16/INPC16
P27/OUTC17/INPC17
38
P24/OUTC14/INPC14
P25/OUTC15/INPC15
39
P23/OUTC13/INPC13
41
40
P21/OUTC11/INPC11/SCLMM
P22/OUTC12/INPC12
42
P20/OUTC10/INPC10/SDAMM
44
43
P16/INT4/IDW
P17/INT5/INPC17/IDU
45
47
46
P03/AN03
P15/INT3/ADTRG/IDV
48
M16C/29 Group
P02/AN02
49
32
P30/CLK3
P01/AN01
50
31
P31/SIN3
P00/AN00
51
30
P32/SOUT3
P107/AN7/KI3
52
29
P33
P106/AN6/KI2
53
28
P64/CTS1/RTS1/CTS0/CLKS1
P105/AN5/KI1
54
P104/AN4/KI0
55
M16C/29 Group (M16C/29)
27
P65/CLK1
26
P66/RxD1
P103/AN3
56
P102/AN2
57
P101/AN1
58
AVSS
59
P100/AN0
60
VREF
61
20
AVCC
62
19
P75/TA2IN/W
P93/AN24/CTX
63
18
P76/TA3OUT
P92/AN32/TB2IN/CRX
64
17
P77/TA3IN
NOTES:
1.Set bits PACR2 to PACR0 in the PACR register to "0102" before
signals are input or output to individual pins after reset. When the
PACR register is not set, signals are not input or output for some
Figure 1.9 Pin Assignment (Top View) of 64-Pin Package
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 15 of 458
16
P80/TA4OUT/U
15
P81/TA4IN/U
13
14
12
P82/INT0
11
P85/NMI/SD
P84/INT2/ZP
P83/INT1
10
VCC
7
XOUT
8
6
RESET
9
5
P86/XCOUT
XIN
4
VSS
3
CNVSS
2
P87/XCIN
1
P91/AN31/TB1IN
P90/AN30/TB0IN/CLKOUT
PLQP0064KB-A
(64P6Q-A)
(top view)
25
P67/TxD1
24
P70/TxD2/SDA2/TA0OUT/RTS1/CTS1/CTS0/CLKS1
23
P71/RxD2/SCL2/TA0IN/CLK1
22
P72/CLK2/TA1OUT/V/RxD1
21
P73/CTS2/RTS2/TA1IN/V/TxD1
P74/TA2OUT/W
1. Overview
M16C/29 Group
Table 1.13 Pin Characteristics for 64-Pin Package
Pin
No.
Control
Pin
1
Port
AN30
XCIN
P87
5
XCOUT
P86
6
RESET
7
XOUT
Vcc
11
Analog Pin
AN31
CNVss
10
Mult-master
I2C bus Pin
TB0IN
3
Vss
UART/CAN Pin
TB1IN
4
XIN
Timer S Pin
P90
CLKOUT
9
Timer Pin
P9 1
2
8
Interrupt
Pin
P 85
NMI
SD
12
P84
INT2
ZP
13
P8 3
INT1
14
P 82
INT0
15
P 81
TA4IN / U
16
P80
TA4OUT / U
17
P77
TA3IN
18
P 76
TA3OUT
19
P 75
TA2IN / W
20
P74
TA2OUT / W
21
P73
TA1IN / V
CTS2 / RTS2 / TXD1
22
P 72
TA1OUT / V
CLK2 / RXD1
23
P 71
TA0IN
RXD2 / SCL2 / CLK1
24
P 70
TA0OUT
TXD2 / SDA2 / RTS1 /
CTS1 / CTS0 / CLKS1
25
P 67
TXD1
26
P 66
RXD1
27
P 65
28
P 64
CLK1
RTS1 / CTS1/ CTS0 /
CLKS1
29
P 33
30
P 32
SOUT3
31
P 31
SIN3
32
P 30
CLK3
33
P 63
TXD0
34
P 62
RXD0
35
P 61
CLK0
36
P 60
37
P 27
OUTC17 / INPC17
38
P 26
OUTC16 / INPC16
39
P 25
OUTC15 / INPC15
40
P 24
OUTC14 / INPC14
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
RTS0 / CTS0
page 16 of 458
1. Overview
M16C/29 Group
Table 1.13 Pin Characteristics for 64-Pin Package (continued)
Pin
No.
Control
Pin
Port
Interrupt
Pin
Timer Pin
Timer S Pin
UART/CAN Pin
Multi-master
I2C bus Pin
41
P23
OUTC13 / INPC13
42
P22
OUTC12 / INPC12
43
P21
OUTC11 / INPC11
SCLMM
OUTC10 / INPC10
SDAMM
44
P20
45
P17
INT5
IDU
Analog Pin
INPC17
46
P16
INT4
IDW
47
P15
INT3
IDV
48
P03
AN03
49
P02
AN02
50
P01
AN01
51
P00
AN00
52
P107 KI3
AN7
53
P106 KI2
AN6
54
P105 KI1
AN5
55
P104 KI0
AN4
56
P103
AN3
57
P102
AN2
58
P101
AN1
P100
AN0
ADTRG
59 AVss
60
61 VREF
62 AVcc
63
P93
64
P92
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
TB2IN
page 17 of 458
CTX
AN24
CRX
AN32
1. Overview
M16C/29 Group
1.5 Pin Description
Table 1.14 Pin Description (64-pin and 80-pin packages)
Classification
Symbol
Power supply VCC, VSS
I/O Type
Function
Apply 0V to the Vss pin. Apply following voltage to the Vcc pin.
I
2.7 to 5.5 V (Normal), 3.0 to 5.5 V (T-ver.), 4.2 to 5.5 V (V-ver.)
Supplies power to the A/D converter. Connect the AVCC pin to VCC and
I
Analog power
supply
AVCC
AVSS
Reset input
CNVSS
RESET
CNVSS
I
the AVSS pin to VSS
___________
The microcomputer is in a reset state when "L" is applied to the RESET pin
I
Connect the CNVSS pin to VSS
Main clock
XIN
I
I/O pins for the main clock oscillation circuit. Connect a ceramic resonator
XOUT
O
it to XIN and leave XOUT open. If XIN is not used (for external oscillator or
XCIN
I
O
I/O pins for the sub clock oscillation circuit. Connect a crystal oscillator
between XCIN and XCOUT
O
I
Outputs the clock having the same frequency as f1, f8, f32, or fC
______
________
Input pins for the INT interrupt. INT2 can be used for Timer A Z-phase
I
function
_______
_______
Input pin for the NMI interrupt. NMI cannot be used as I/O port while the three-
input
Main clock
output
Sub clock input
Sub clock output
____________
XCOUT
CLKOUT
Clock output
______
INT interrupt
________
input
_______
NMI interrupt
_______
________
INT0 to INT5
NMI
input
_____
or crystal oscillator between XIN and XOUT. To apply external clock, apply
external clock) connect XIN pin to VCC and leave XOUT open
_______
phase motor control is enabled. Apply a stable "H" to NMI after setting it's
direction register to "0" when the three-phase motor control is enabled
_____
Key input interrupt KI0 to KI3
Timer A
TA0OUT to
TA4OUT
I
I/O
Input pins for the key input interrupt
I/O pins for the timer A0 to A4
TA0IN to
TA4IN
I
Input pins for the timer A0 to A4
ZP
TB0IN to
I
I
Input pin for Z-phase
TB2IN
___
___
U, U, V, V,
O
Output pins for the three-phase motor control timer
timer output
W, W
IDU, IDW,
I/O
Input and output pins for the three-phase motor control timer
Serial I/O
IDV, SD
_________
_________
CTS0 to CTS2
I
RTS0 to RTS2
CLK0 to CLK3
O
I/O
RxD0 to RxD2
SIN3
I
I
TxD0 to TxD2
SOUT3
O
O
CLKS1
SDA2
O
I/O
SCL2
SDAMM
I/O
SCLMM
VREF
I
Applies reference voltage to the A/D converter
AN0 to AN7
I
Analog input pins for the A/D converter
I
Input pin for an external A/D trigger
Timer B
Three-phase
motor control
___
_____
_________
I2C bus Mode
Multi-master
I2C bus
Reference
voltage input
A/D converter
_________
Input pins for the timer B0 to B2
Input pins for data transmission control
Output pins for data reception control
Inputs and outputs the transfer clock
Inputs serial data
Inputs serial data
Outputs serial data
Outputs serial data
Output pin for transfer clock
Inputs and outputs serial data
Inputs and outputs the transfer clock
Inputs and outputs serial data
Inputs and outputs the transfer clock
AN00 to AN03
AN24
AN30 to AN32
___________
ADTRG
I: Input
O: Output
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
I/O: Input and output
page 18 of 458
1. Overview
M16C/29 Group
Table 1.14 Pin Description (64-pin and 80-pin packages) (Continued)
Classification
Timer S
CAN
Symbol
I/O Type
Function
INPC10 to INPC17
I
Input pins for the time measurement function
OUTC10 to OUTC17
O
Output pins for the waveform generating function
CRX
I
Input pin for the CAN communication function
I/O Ports
CTX
P00 to P03
O
I/O
P15 to P17
P20 to P27
Output pin for the CAN communication function
CMOS I/O ports which have a direction register determines an individual
pin is used as an input port or an output port. A pull-up resistor is selectable for every 4 input ports.
P30 to P33
P60 to P67
P70 to P77
P80 to P87
P90 to P93
P100 to P107
I: Input
O: Output
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
I/O: Input and output
page 19 of 458
1. Overview
M16C/29 Group
Table 1.14 Pin Description (80-pin packages only) (Continued)
Classification
Serial I/O
Symbol
CLK4
SIN4
I/O Type
I/O
SOUT4
A/D Converter AN04 to AN07
I
O
I
Function
Inputs and outputs the transfer clock
Inputs serial data
Outputs serial data
Analog input pins for the A/D converter
AN20 to AN23
AN25 to AN27
I/O Ports
P04 to P07
P10 to P14
I/O
P34 to P37
P95 to P97
I : Input
O : Output
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
CMOS I/O ports which have a direction register determines an individual
pin is used as an input port or an output port. A pull-up resistor is selectable for every 4 input ports.
I/O : Input and output
page 20 of 458
2. Central Processing Unit (CPU)
M16C/29 Group
2. Central Processing Unit (CPU)
Figure 2.1 shows the CPU registers. The CPU has 13 registers. Of these, R0, R1, R2, R3, A0, A1 and FB
comprise a register bank. There are two register banks.
b31
b15
b8 b7
b0
R2
R0H(R0's high bits) R0L(R0's low bits)
R3
R1H(R1's high bits)R1L(R1's low bits)
R2
Data registers (Note)
R3
A0
b19
A1
Address registers (Note)
FB
Frame base registers (Note)
b15
b0
INTBH
INTBL
Interrupt table register
The upper 4 bits of INTB are INTBH and
the lower 16 bits of INTB are INTBL.
b19
b0
PC
Program counter
b15
b0
USP
User stack pointer
ISP
Interrupt stack pointer
SB
Static base register
b15
b0
FLG
b15
b8
b7
b
Flag register
b0
Carry flag
Debug flag
Zero flag
Sign flag
Register bank select flag
Overflow flag
Interrupt enable flag
Stack pointer select flag
Reserved area
Processor interrupt priority level
Reserved area
Note: These registers comprise a register bank. There are two register banks.
Figure 2.1. Central Processing Unit Register
2.1 Data Registers (R0, R1, R2 and R3)
The R0 register consists of 16 bits, and is used mainly for transfers and arithmetic/logic operations. R1 to
R3 are the same as R0.
The R0 register can be separated between high (R0H) and low (R0L) for use as two 8-bit data registers.
R1H and R1L are the same as R0H and R0L. Conversely, R2 and R0 can be combined for use as a 32-bit
data register (R2R0). R3R1 is the same as R2R0.
2.2 Address Registers (A0 and A1)
The register A0 consists of 16 bits, and is used for address register indirect addressing and address register relative addressing. They also are used for transfers and arithmetic/logic operations. A1 is the same as
A0.
In some instructions, registers A1 and A0 can be combined for use as a 32-bit address register (A1A0).
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 21 of 458
2. Central Processing Unit (CPU)
M16C/29 Group
2.3 Frame Base Register (FB)
FB is configured with 16 bits, and is used for FB relative addressing.
2.4 Interrupt Table Register (INTB)
INTB is configured with 20 bits, indicating the start address of an interrupt vector table.
2.5 Program Counter (PC)
PC is configured with 20 bits, indicating the address of an instruction to be executed.
2.6 User Stack Pointer (USP) and Interrupt Stack Pointer (ISP)
Stack pointer (SP) comes in two types: USP and ISP, each configured with 16 bits.
Your desired type of stack pointer (USP or ISP) can be selected by the U flag of FLG.
2.7 Static Base Register (SB)
SB is configured with 16 bits, and is used for SB relative addressing.
2.8 Flag Register (FLG)
FLG consists of 11 bits, indicating the CPU status.
2.8.1 Carry Flag (C Flag)
This flag retains a carry, borrow, or shift-out bit that has occurred in the arithmetic/logic unit.
2.8.2 Debug Flag (D Flag)
The D flag is used exclusively for debugging purpose. During normal use, it must be set to 0.
2.8.3 Zero Flag (Z Flag)
This flag is set to 1 when an arithmetic operation resulted in 0; otherwise, it is 0.
2.8.4 Sign Flag (S Flag)
This flag is set to 1 when an arithmetic operation resulted in a negative value; otherwise, it is 0.
2.8.5 Register Bank Select Flag (B Flag)
Register bank 0 is selected when this flag is 0 ; register bank 1 is selected when this flag is 1.
2.8.6 Overflow Flag (O Flag)
This flag is set to 1 when the operation resulted in an overflow; otherwise, it is 0.
2.8.7 Interrupt Enable Flag (I Flag)
This flag enables a maskable interrupt.
Maskable interrupts are disabled when the I flag is 0, and are enabled when the I flag is 1.
The I flag is cleared to 0 when the interrupt request is accepted.
2.8.8 Stack Pointer Select Flag (U Flag)
ISP is selected when the U flag is 0; USP is selected when the U flag is 1.
The U flag is cleared to 0 when a hardware interrupt request is accepted or an INT instruction for software
interrupt Nos. 0 to 31 is executed.
2.8.9 Processor Interrupt Priority Level (IPL)
IPL is configured with three bits, for specification of up to eight processor interrupt priority levels from level
0 to level 7.
If a requested interrupt has priority greater than IPL, the interrupt is enabled.
2.8.10 Reserved Area
When write to this bit, write 0. When read, its content is undefined.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 22 of 458
3. Memory
M16C/29 Group
3. Memory
Figure 3.1 is a memory map of the M16C/29 Group. M16C/29 Group provides 1-Mbyte address space from
addresses 0000016 to FFFFF16. The internal ROM is allocated lower addresses beginning with address
FFFFF16. For example, 64-Kbytes internal ROM is allocated addresses F000016 to FFFFF16.
Two 2-Kbyte internal ROM areas, block A and block B, are available in the flash memory version. The
blocks are allocated addresses F00016 to FFFF16.
The fixed interrupt vector tables are allocated addresses FFFDC16 to FFFFF16. It stores the starting address of each interrupt routine. See the section on interrupts for details.
The internal RAM is allocated higher addresses beginning with address 0040016. For example, 4-Kbytes
internal RAM is allocated addresses 0040016 to 013FF16. Besides sotring data, it becomes stacks when the
subroutines is called or an interrupt is acknowledged.
SFR, consisting of control registers for peripheral functions such as I/O port, A/D converter, serial I/O,
timers is allocated addresses 0000016 to 003FF16. All blank spaces within SFR are reserved and cannot be
accessed by users.
The special page vector table is allocated to the addresses FFE0016 to FFFDB16. This vector is used by the
JMPS or JSRS instruction. For details, refer to the M16C/60 and M16C/20 Series Software Manual.
Internal RAM area
0000016
SFR Area
Internal ROM area
Memory size
Memory size
XXXXX16
4 Kbytes
013FF16
64 Kbytes
F000016
8 Kbytes
023FF16
96 Kbytes
E800016
12 Kbytes
033FF16
128 Kbytes
E000016
0040016
Internal RAM
FFE0016
XXXXX16
Reserved Space
0F00016
0FFFF16
Special Page
Vector Table
Internal ROM
(data space)(1)
FFFDC16
Undefined Instruction
FFFFF16
Overflow
BRK Instruction
Address Match
Single Step
Watchdog Timer
DBC
NMI
Reset
Reserved Space
YYYYY16
FFFFF16
Internal ROM(2)
(program space)
NOTES:
1. The block A (2K bytes) and block B (2K bytes) are shown (only flash memory).
2. Do not write to the internal ROM area in Mask ROM ver..
Figure 3.1 Memory Map
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 23 of 458
YYYYY16
4. Special Function Registers (SFRs)
M16C/29 Group
4. Special Function Registers (SFRs)
SFRs (Special Function Registers) are the control registers of peripheral functions. Table 4.1 to 4.11 list the
SFR address map.
Table 4.1 SFR Information (1)
Register
Symbol
After reset
Processor mode register 0
Processor mode register 1
System clock control register 0
System clock control register 1
PM0
PM1
CM0
CM1
0016
000010002
010010002
001000002
Address match interrupt enable register
Protect register
AIER
PRCR
XXXXXX002
XX0000002
CM2
0X0000102
Watchdog timer start register
Watchdog timer control register
Address match interrupt register 0
WDTS
WDC
RMAD0
XX16
00XXXXXX2
0016
0016
X016
Address match interrupt register 1
RMAD1
0016
0016
X016
VCR1
VCR2
000010002
0016
PLC0
0001X0102
PM2
D4INT
SAR0
XXX000002
0016
XX16
XX16
XX16
DMA0 destination pointer
DAR0
XX16
XX16
XX16
DMA0 transfer counter
TCR0
XX16
XX16
DMA0 control register
DM0CON
00000X002
DMA1 source pointer
SAR1
XX16
XX16
XX16
DMA1 destination pointer
DAR1
XX16
XX16
XX16
DMA1 transfer counter
TCR1
XX16
XX16
DMA1 control register
DM1CON
00000X002
Address
000016
000116
000216
000316
000416
000516
000616
000716
000816
000916
000A16
000B16
000C16
Oscillation stop detection register
(Note 2)
000D16
000E16
000F16
001016
001116
001216
001316
001416
001516
001616
001716
001816
001916
001A16
Voltage detection register 1
Voltage detection register 2
(Note 3,4)
(Note 3,4)
001B16
001C16
PLL control register 0
001D16
001E16
001F16
002016
Processor mode register 2
Low voltage detection interrupt register
DMA0 source pointer
(Note 4)
002116
002216
002316
002416
002516
002616
002716
002816
002916
002A16
002B16
002C16
002D16
002E16
002F16
003016
003116
003216
003316
003416
003516
003616
003716
003816
003916
003A16
003B16
003C16
003D16
003E16
003F16
Note 1: The blank areas are reserved and cannot be used by users.
Note 2: Bits CM20, CM21, and CM27 do not change at oscillation stop detection reset.
Note 3: This register does not change at software reset, watchdog timer reset and oscillation stop detection reset.
Note 4: This registe can not use for T-ver. and V-ver.
X : Undefined
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 24 of 458
4. Special Function Registers (SFRs)
M16C/29 Group
Table 4.2 SFR Information (2)
Register
Address
Symbol
After reset
C01WKIC
C0RECIC
C0TRMIC
INT3IC
ICOC0IC
XXXXX0002
XXXXX0002
XXXXX0002
XX00X0002
XXXXX0002
XXXXX0002
XXXXX0002
XX00X0002
XX00X0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XX00X0002
XX00X0002
XX00X0002
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
004016
004116
004216
004316
004416
004516
004616
004716
004816
004916
004A16
004B16
004C16
004D16
004E16
004F16
005016
005116
005216
005316
005416
005516
005616
005716
005816
005916
005A16
005B16
005C16
005D16
005E16
005F16
006016
CAN0 wakeup interrupt control register
CAN0 successful reception interrupt control register
CAN0 successful transmission interrupt control register
INT3 interrupt control register
ICOC 0 interrupt control register
ICOC 1 interrupt control register, I2C bus interface interrupt control register 1
ICOC base timer interrupt control register, SCL/SDA interrupt control register 2
SI/O4 interrupt control register, INT5 interrupt control register
SI/O3 interrupt control register, INT4 interrupt control register
UART2 Bus collision detection interrupt control register
DMA0 interrupt control register
DMA1 interrupt control register
CAN0 error interrupt control register
A/D conversion interrupt control register, Key input interrupt control register
(Note 2)
UART2 transmit interrupt control register
UART2 receive interrupt control register
UART0 transmit interrupt control register
UART0 receive interrupt control register
UART1 transmit interrupt control register
UART1 receive interrupt control register
TimerA0 interrupt control register
TimerA1 interrupt control register
TimerA2 interrupt control register
TimerA3 interrupt control register
TimerA4 interrupt control register
TimerB0 interrupt control register
TimerB1 interrupt control register
TimerB2 interrupt control register
INT0 interrupt control register
INT1 interrupt control register
INT2 interrupt control register
CAN0 message box 0: Identifier/DLC
006116
006216
006316
006416
006516
006616
CAN0 message box 0 : Data field
006716
006816
006916
006A16
006B16
006C16
006D16
006E16
CAN0 message box 0 : Time stamp
006F16
007016
CAN0 message box 1 : Identifier/DLC
007116
007216
007316
007416
007516
007616
CAN0 message box 1 : Data field
007716
007816
007916
007A16
007B16
007C16
007D16
007E16
CAN0 message box 1 : Time stamp
007F16
ICOC1IC,IICIC
BTIC,SCLDAIC
S4IC, INT5IC
S3IC, INT4IC
BCNIC
DM0IC
DM1IC
C01ERRIC
ADIC, KUPIC
S2TIC
S2RIC
S0TIC
S0RIC
S1TIC
S1RIC
TA0IC
TA1IC
TA2IC
TA3IC
TA4IC
TB0IC
TB1IC
TB2IC
INT0IC
INT1IC
INT2IC
Note 1: The blank areas are reserved and cannot be used by users.
Note 2: A/D conversion interrupt control register is effective when the bit1(Interrupt source select register ( address 35Eh IFSR2A)
is set to "0". Key input interrupt control register is effective when the bit1 is set to "1".
X : Undefined
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 25 of 458
4. Special Function Registers (SFRs)
M16C/29 Group
Table 4.3 SFR Information (3)
Address
008016
Register
CAN0 message box 2: Identifier/DLC
008116
008216
008316
008416
008516
008616
CAN0 message box 2 : Data field
008716
008816
008916
008A16
008B16
008C16
008D16
008E16
008F16
009016
CAN0 message box 2 : Time stamp
CAN0 message box 3 : Identifier/DLC
009116
009216
009316
009416
009516
009616
CAN0 message box 3 : Data field
009716
009816
009916
009A16
009B16
009C16
009D16
009E16
009F16
00A016
CAN0 message box 3 : Time stamp
CAN0 message box 4: Identifier/DLC
00A116
00A216
00A316
00A416
00A516
00A616
CAN0 message box 4 : Data field
00A716
00A816
00A916
00AA16
00AB16
00AC16
00AD16
00AE16
00AF16
00B016
CAN0 message box 4 : Time stamp
CAN0 message box 5 : Identifier/DLC
00B116
00B216
00B316
00B416
00B516
00B616
CAN0 message box 5 : Data field
00B716
00B816
00B916
00BA16
00BB16
00BC16
00BD16
00BE16
CAN0 message box 5 : Time stamp
00BF16
Note 1: The blank areas are reserved and cannot be used by users.
X : Undefined
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 26 of 458
Symbol
After reset
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
4. Special Function Registers (SFRs)
M16C/29 Group
Table 4.4 SFR Information (4)
Address
00C016
Register
CAN0 message box 6: Identifier/DLC
00C116
00C216
00C316
00C416
00C516
00C616
CAN0 message box 6 : Data field
00C716
00C816
00C916
00CA16
00CB16
00CC16
00CD16
00CE16
00CF16
00D016
CAN0 message box 6 : Time stamp
CAN0 message box 7 : Identifier/DLC
00D116
00D216
00D316
00D416
00D516
00D616
CAN0 message box 7 : Data field
00D716
00D816
00D916
00DA16
00DB16
00DC16
00DD16
00DE16
CAN0 message box 7 : Time stamp
00DF16
00E016
CAN0 message box 8: Identifier/DLC
00E116
00E216
00E316
00E416
00E516
00E616
CAN0 message box 8: Data field
00E716
00E816
00E916
00EA16
00EB16
00EC16
00ED16
00EE16
00EF16
00F016
CAN0 message box 8 : Time stamp
CAN0 message box 9 : Identifier/DLC
00F116
00F216
00F316
00F416
00F516
00F616
CAN0 message box 9 : Data field
00F716
00F816
00F916
00FA16
00FB16
00FC16
00FD16
00FE16
CAN0 message box 9 : Time stamp
00FF16
Note 1: The blank areas are reserved and cannot be used by users.
X : Undefined
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 27 of 458
Symbol
After reset
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
4. Special Function Registers (SFRs)
M16C/29 Group
Table 4.5 SFR Information (5)
Address
010016
Register
CAN0 message box 10: Identifier/DLC
010116
010216
010316
010416
010516
010616
CAN0 message box 10 : Data field
010716
010816
010916
010A16
010B16
010C16
010D16
010E16
010F16
011016
CAN0 message box 10 : Time stamp
CAN0 message box 11 : Identifier/DLC
011116
011216
011316
011416
011516
011616
CAN0 message box 11 : Data field
011716
011816
011916
011A16
011B16
011C16
011D16
011E16
CAN0 message box 11 : Time stamp
011F16
012016
CAN0 message box 12: Identifier/DLC
012116
012216
012316
012416
012516
012616
CAN0 message box 12: Data field
012716
012816
012916
012A16
012B16
012C16
012D16
012E16
012F16
013016
CAN0 message box 12 : Time stamp
CAN0 message box 13 : Identifier/DLC
013116
013216
013316
013416
013516
013616
CAN0 message box 13 : Data field
013716
013816
013916
013A16
013B16
013C16
013D16
013E16
CAN0 message box 13 : Time stamp
013F16
Note 1: The blank areas are reserved and cannot be used by users.
X : Undefined
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 28 of 458
Symbol
After reset
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
4. Special Function Registers (SFRs)
M16C/29 Group
Table 4.6 SFR Information (6)
Address
014016
Register
CAN0 message box 14: Identifier/DLC
Symbol
014116
014216
014316
014416
014516
014616
CAN0 message box 14 : Data field
014716
014816
014916
014A16
014B16
014C16
014D16
014E16
014F16
015016
CAN0 message box 14 : Time stamp
CAN0 message box 15 : Identifier/DLC
015116
015216
015316
015416
015516
015616
CAN0 message box 15 : Data field
015716
015816
015916
015A16
015B16
015C16
015D16
015E16
015F16
016016
CAN0 message box 15 : Time stamp
CAN0 global mask register
C0GMR
CAN0 local mask A register
C0LMAR
CAN0 local mask B register
C0LMBR
016116
016216
016316
016416
016516
016616
016716
016816
016916
016A16
016B16
016C16
016D16
016E16
016F16
017016
017116
After reset
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
~
01B316
01B416
01B516
01B616
01B716
~
Flash memory control register 4
(Note 2)
FMR4
0100000X2
Flash memory control register 1
(Note 2)
FMR1
000XXX0X2
Flash memory control register 0
(Note 2)
FMR0
0116
~
~
~
~
01FD16
01FE16
01FF16
Note 1: The blank areas are reserved and cannot be used by users.
Note 2: This register is included in the flash memory version.
X : Undefined
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 29 of 458
4. Special Function Registers (SFRs)
M16C/29 Group
Table 4.7 SFR Information (7)
Address
020016
020116
020216
020316
020416
020516
020616
020716
020816
020916
020A16
020B16
020C16
020D16
020E16
020F16
021016
Register
CAN0 message control register 0
CAN0 message control register 1
CAN0 message control register 2
CAN0 message control register 3
CAN0 message control register 4
CAN0 message control register 5
CAN0 message control register 6
CAN0 message control register 7
CAN0 message control register 8
CAN0 message control register 9
CAN0 message control register 10
CAN0 message control register 11
CAN0 message control register 12
CAN0 message control register 13
CAN0 message control register 14
CAN0 message control register 15
CAN0 control register
Symbol
C0MCTL0
C0MCTL1
C0MCTL2
C0MCTL3
C0MCTL4
C0MCTL5
C0MCTL6
C0MCTL7
C0MCTL8
C0MCTL9
C0MCTL10
C0MCTL11
C0MCTL12
C0MCTL13
C0MCTL14
C0MCTL15
C0CTLR
CAN0 status register
C0STR
CAN0 slot status register
C0SSTR
CAN0 interrupt control register
C0ICR
CAN0 extended ID register
C0IDR
CAN0 configuration register
C0CONR
CAN0 receive error count register
CAN0 transmit error count register
CAN0 time stamp register
C0RECR
C0TECR
C0TSR
021116
021216
021316
021416
021516
021616
021716
021816
021916
021A16
021B16
021C16
021D16
021E16
021F16
After reset
0016
0016
0016
0016
0016
0016
0016
0016
0016
0016
0016
0016
0016
0016
0016
0016
X00000012
XX0X00002
0016
X00000012
0016
0016
0016
0016
0016
0016
XX16
XX16
0016
0016
0016
0016
~
024216
~
CAN0 acceptance filter support register
C0AFS
024316
XX16
XX16
~
~
025A16
025B16
025C16
025D16
025E16
025F16
~
~
Three-phase protect control register
TPRC
0016
On-chip oscillator control register
Pin assignment control register
Peripheral clock select register
CAN0 clock select register
ROCR
PACR
PCLKR
CCLKR
000001012
0016
000000112
0016
~
~
02E016
02E116
02E216
02E316
02E416
02E516
02E616
02E716
02E816
~
~
I2C0 data-shift register
S00
XX16
I2C0 address register
I2C0 control register 0
I2C0 clock control register
I2C0 start/stop condition control register
I2C0 control register 1
I2C0 control register 2
I2C0 status register
S0D0
S1D0
S20
S2D0
S3D0
S4D0
S10
0016
0016
0016
000110102
001100002
0016
0001000X2
~
~
02FD16
02FE16
02FF16
Note 1: The blank areas are reserved and cannot be used by users.
X : Undefined
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 30 of 458
4. Special Function Registers (SFRs)
M16C/29 Group
Table 4.8 SFR Information (8)
Address
030016
Register
Time measurement, Pulse generation register 0
Symbol
G1TM0,G1PO0
Pulse generation control register 0
Pulse generation control register 1
Pulse generation control register 2
Pulse generation control register 3
Pulse generation control register 4
Pulse generation control register 5
Pulse generation control register 6
Pulse generation control register 7
Time measurement control register 0
Time measurement control register 1
Time measurement control register 2
Time measurement control register 3
Time measurement control register 4
Time measurement control register 5
Time measurement control register 6
Time measurement control register 7
Base timer register
G1POCR0
G1POCR1
G1POCR2
G1POCR3
G1POCR4
G1POCR5
G1POCR6
G1POCR7
G1TMCR0
G1TMCR1
G1TMCR2
G1TMCR3
G1TMCR4
G1TMCR5
G1TMCR6
G1TMCR7
G1BT
Base timer control register 0
Base timer control register 1
Time measurement prescale register 6
Time measurement prescale register 7
Function enable register
Function select register
Base timer reset register
G1BCR0
G1BCR1
G1TPR6
G1TPR7
G1FE
G1FS
G1BTRR
Count source division register
G1DV
After reset
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
0X00XX002
0X00XX002
0X00XX002
0X00XX002
0X00XX002
0X00XX002
0X00XX002
0X00XX002
0016
0016
0016
0016
0016
0016
0016
0016
XX16
XX16
0016
0016
0016
0016
0016
0016
XX16
XX16
0016
Time measurement, Pulse generation register 1
G1TM1,G1PO1
Time measurement, Pulse generation register 2
G1TM2,G1PO2
Time measurement, Pulse generation register 3
G1TM3,G1PO3
Time measurement, Pulse generation register 4
G1TM4,G1PO4
Time measurement, Pulse generation register 5
G1TM5,G1PO5
Time measurement, Pulse generation register 6
G1TM6,G1PO6
Time measurement, Pulse generation register 7
G1TM7,G1PO7
Interrupt request register
Interrupt enable register 0
Interrupt enable register 1
G1IR
G1IE0
G1IE1
XX16
0016
0016
NMI digital debounce register
Port P17 digital debounce register
NDDR
P17DDR
FF16
FF16
030116
030216
030316
030416
030516
030616
030716
030816
030916
030A16
030B16
030C16
030D16
030E16
030F16
031016
031116
031216
031316
031416
031516
031616
031716
031816
031916
031A16
031B16
031C16
031D16
031E16
031F16
032016
032116
032216
032316
032416
032516
032616
032716
032816
032916
032A16
032B16
032C16
032D16
032E16
032F16
033016
033116
033216
033316
033416
033516
033616
033716
033816
033916
033A16
033B16
033C16
033D16
033E16
033F16
Note 1: The blank areas are reserved and cannot be used by users.
X : Undefined
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 31 of 458
4. Special Function Registers (SFRs)
M16C/29 Group
Table 4.9 SFR Information (9)
Register
Symbol
After reset
Timer A1-1 register
TA11
Timer A2-1 register
TA21
Timer A4-1 register
TA41
Three phase PWM control register 0
Three phase PWM control register 1
Three phase output buffer register 0
Three phase output buffer register 1
Dead time timer
Timer B2 Interrupt occurrence frequency set counter
Position - data - retain function control register
INVC0
INVC1
IDB0
IDB1
DTT
ICTB2
PDRF
XX16
XX16
XX16
XX16
XX16
XX16
0016
0016
0016
0016
XX16
XX16
XXXX00002
Port function control register
PFCR
001111112
Interrupt cause select register 2(2)
Interrupt cause select register
SI/O3 transmit/receive register
IFSR2A
IFSR
S3TRR
00XXX0002
0016
XX16
SI/O3 control register
SI/O3 bit rate register
SI/O4 transmit/receive register
S3C
S3BRG
S4TRR
010000002
XX16
XX16
SI/O4 control register
SI/O4 bit rate register
S4C
S4BRG
010000002
XX16
UART2 special mode register 4
UART2 special mode register 3
UART2 special mode register 2
UART2 special mode register
UART2 transmit/receive mode register
UART2 bit rate register
UART2 transmit buffer register
U2SMR4
U2SMR3
U2SMR2
U2SMR
U2MR
U2BRG
U2TB
UART2 transmit/receive control register 0
UART2 transmit/receive control register 1
UART2 receive buffer register
U2C0
U2C1
U2RB
0016
000X0X0X2
X00000002
X00000002
0016
XX16
XX16
XX16
000010002
000000102
XX16
XX16
Address
034016
034116
034216
034316
034416
034516
034616
034716
034816
034916
034A16
034B16
034C16
034D16
034E16
034F16
035016
035116
035216
035316
035416
035516
035616
035716
035816
035916
035A16
035B16
035C16
035D16
035E16
035F16
036016
036116
036216
036316
036416
036516
036616
036716
036816
036916
036A16
036B16
036C16
036D16
036E16
036F16
037016
037116
037216
037316
037416
037516
037616
037716
037816
037916
037A16
037B16
037C16
037D16
037E16
037F16
Note 1: The blank areas are reserved and cannot be used by users.
Note 2: Write 0 to the bit 0 after reset.
X : Undefined
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 32 of 458
4. Special Function Registers (SFRs)
M16C/29 Group
Table 4.10 SFR Information (10)
Address
038016
038116
038216
038316
038416
038516
038616
038716
038816
Register
Count start flag
Clock prescaler reset flag
One-shot start flag
Trigger select register
Up-dowm flag
Symbol
TABSR
CPSRF
ONSF
TRGSR
UDF
After reset
0016
0XXXXXXX2
0016
0016
0016
Timer A0 register
TA0
Timer A1 register
TA1
Timer A2 register
TA2
Timer A3 register
TA3
Timer A4 register
TA4
Timer B0 register
TB0
Timer B1 register
TB1
Timer B2 register
TB2
Timer A0 mode register
Timer A1 mode register
Timer A2 mode register
Timer A3 mode register
Timer A4 mode register
Timer B0 mode register
Timer B1 mode register
Timer B2 mode register
Timer B2 special mode register
TA0MR
TA1MR
TA2MR
TA3MR
TA4MR
TB0MR
TB1MR
TB2MR
TB2SC
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
0016
0016
0016
0016
0016
00XX00002
00XX00002
00XX00002
X00000002
UART0 transmit/receive mode register
UART0 bit rate register
UART0 transmit buffer register
U0MR
U0BRG
U0TB
UART0 transmit/receive control register 0
UART0 transmit/receive control register 1
UART0 receive buffer register
U0C0
U0C1
U0RB
UART1 transmit/receive mode register
UART1 bit rate register
UART1 transmit buffer register
U1MR
U1BRG
U1TB
UART1 transmit/receive control register 0
UART1 transmit/receive control register 1
UART1 receive buffer register
U1C0
U1C1
U1RB
UART transmit/receive control register 2
UCON
CRC snoop address register
CRCSAR
CRC mode register
CRCMR
XX16
00XXXXXX2
0XXXXXX02
DMA0 request cause select register
DM0SL
0016
DMA1 request cause select register
DM1SL
0016
CRC data register
CRCD
CRC input register
CRCIN
XX16
XX16
XX16
038916
038A16
038B16
038C16
038D16
038E16
038F16
039016
039116
039216
039316
039416
039516
039616
039716
039816
039916
039A16
039B16
039C16
039D16
039E16
039F16
03A016
03A116
03A216
03A316
03A416
03A516
03A616
03A716
03A816
03A916
03AA16
03AB16
03AC16
03AD16
03AE16
03AF16
03B016
0016
XX16
XX16
XX16
000010002
000000102
XX16
XX16
0016
XX16
XX16
XX16
000010002
000000102
XX16
XX16
X00000002
03B116
03B216
03B316
03B416
03B516
03B616
03B716
03B816
03B916
03BA16
03BB16
03BC16
03BD16
03BE16
03BF16
Note 1: The blank areas are reserved and cannot be used by users.
X : Undefined
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 33 of 458
4. Special Function Registers (SFRs)
M16C/29 Group
Table 4.11 SFR Information (11)
Address
03C016
03C116
03C216
Register
A/D register 0
Symbol
AD0
A/D register 1
AD1
A/D register 2
AD2
A/D register 3
AD3
A/D register 4
AD4
A/D register 5
AD5
A/D register 6
AD6
A/D register 7
AD7
A/D trigger control register
A/D status register 0
A/D control register 2
ADTRGCON
ADSTAT0
ADCON2
XXXX00002
00000X002
0016
A/D control register 0
A/D control register 1
ADCON0
ADCON1
00000XXX2
0016
Port P0 register
Port P1 register
Port P0 direction register
Port P1 direction register
Port P2 register
Port P3 register
Port P2 direction register
Port P3 direction register
P0
P1
PD0
PD1
P2
P3
PD2
PD3
XX16
XX16
0016
0016
XX16
XX16
0016
0016
Port P6 register
Port P7 register
Port P6 direction register
Port P7 direction register
Port P8 register
Port P9 register
Port P8 direction register
Port P9 direction register
Port P10 register
P6
P7
PD6
PD7
P8
P9
PD8
PD9
P10
XX16
XX16
0016
0016
XX16
XX16
0016
000X00002
XX16
Port P10 direction register
PD10
0016
Pull-up control register 0
Pull-up control register 1
Pull-up control register 2
Port control register
PUR0
PUR1
PUR2
PCR
0016
0016
0016
0016
03C316
03C416
03C516
03C616
03C716
03C816
03C916
03CA16
03CB16
03CC16
03CD16
03CE16
After reset
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
XX16
03CF16
03D016
03D116
03D216
03D316
03D416
03D516
03D616
03D716
03D816
03D916
03DA16
03DB16
03DC16
03DD16
03DE16
03DF16
03E016
03E116
03E216
03E316
03E416
03E516
03E616
03E716
03E816
03E916
03EA16
03EB16
03EC16
03ED16
03EE16
03EF16
03F016
03F116
03F216
03F316
03F416
03F516
03F616
03F716
03F816
03F916
03FA16
03FB16
03FC16
03FD16
03FE16
03FF16
Note 1: The blank areas are reserved and cannot be used by users.
X : Undefined
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 34 of 458
5. Resets
M16C/29 Group
5. Resets
Hardware reset 1, brown-out detection reset (hardware reset 2), software reset, watchdog timer reset, and
oscillation stop detection reset are implemented to reset the MCU.
5.1 Hardware Reset
Hardware reset 1 and brown-out detection reset are available as the hardware reset.
5.1.1 Hardware Reset 1
____________
Pins, CPU, and SFRs are reset by using the RESET pin. When a low-level (“L”) signal is applied to the
____________
RESET pin while the supply voltage meets the recommended operating condition, pins, CPU, and SFRs
____________
are reset (see Table 5.1 Pin Status When RESET Pin Level is “L”). The oscillation circuit is also reset and
the on-chip oscillator starts oscillating as the CPU clock. CPU and SFRs re reset when the signal applied
____________
to the RESET pin changes from “L” to high (“H”). The MCU executes a program beginning with the
address indicated by the reset vector. The internal RAM is not reset. When an “L” signal is applied to the
____________
RESET pin while writing data to the internal RAM, the content of internal RAM is undefined.
Figure 5.1 shows an example of the reset circuit. Figure 5.2 shows a reset sequence. Table 5.1 shows
____________
status of the other pins while the RESET pin is held “L”. Figure 5.3 shows CPU register states after reset.
Refer to 4. Special Function Register (SFR) about SFR states after reset.
1. Reset on a stable supply voltage
____________
(1) Apply an “L” signal to the RESET pin
(2) Wait td(ROC) or more
____________
(3) Apply an “H” signal to the RESET pin
2. Power-on reset
____________
(1) Apply an “L” signal to the RESET pin
(2) Increase the supply voltage until it meets the the recommended performance condition
(3) Wait for td(P-R) or more to allow the internal power supply to stabilize
(4) Wait td(ROC) or more
____________
(5) Apply an “H” signal to the RESET pin
5.1.2 Brown-Out Detection Reset (Hardware Reset 2)
Note
Brown-out detection reset in the M16C/29 Group, T-ver. and V-ver. cannot be used.
Pins, CPU, and SFR are reset by using the on-chip voltage detection circuit, which monitors the voltage
applied to VCC pin.
When the VC26 bit in the VCR2 register is set to 1 (reset level detection circuit enabled), pins, CPU, and
SFR are reset as soon as the voltage applied to the VCC pin drops to Vdet3 or below.
Then, pins, CPU, and SFR are reset as soon as the voltage applied to the VCC pin reaches Vdet3r or
above. The MCU executes the program in an address determined by the reset vector.
The MCU executes the program after detecting Vdet3r and waiting td(S-R) ms. The same pins and
registers are reset by the hardware reset 1 and brown-out detection reset, and are also placed in the
same reset state.
The MCU cannot exit stop mode by brown-out detection reset.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 35 of 458
5. Resets
M16C/29 Group
Recommended
operating
voltage
VCC
0V
RESET
VCC
RESET
0V
Equal to or less
than 0.2VCC
Equal to or less
than 0.2VCC
More than td(ROC) + td(P-R)
Figure 5.1 Example Reset Circuit
5.2 Software Reset
The MCU resets its pins, CPU, and SFRs when the PM03 bit in the PM0 register is set to 1 (reset) and the
MCU executes a program in an address indicated by the reset vector. Then the on-chip oscillator is selected as the CPU clock.
The software reset does not reset some portions of the SFRs. Refer to 4. Special Function Registers
(SFRs) for details.
5.3 Watchdog Timer Reset
The MCU resets its pins, CPU, and SFRs when the PM12 bit in the PM1 register is set to 1 (watchdog timer
reset) and the watchdog timer underflows. The MCU executes a program in an address indicated by the
reset vector. Then the on-chip oscillator is selected as the CPU clock.
The watchdog timer reset does not reset some portions of the SFRs. Refer to 4. Special Function Registers (SFRs) for details.
5.4 Oscillation Stop Detection Reset
The MCU resets its pins, CPU, and SFRs and stops if the main clock stop is detected when the CM20 bit in
the CM2 register is set to 1 (oscillation stop, re-oscillation detection function enabled) and the CM27 bit in
the CM2 register is 0 (reset at oscillation stop detection). Refer to the section 7.8 oscillation stop, reoscillation detection function for details.
The oscillation stop detection reset does not reset some portions of the SFRs. Refer to 4. Special Function Registers (SFRs).
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 36 of 458
5. Resets
M16C/29 Group
VCC
ROC
More than
td(ROC)
td(P-R)
RESET
Max. 2 ms
CPU clock: 28 cycles
CPU clock
FFFFC 16
Content of reset vector
FFFFE16
Address
Figure 5.2 Reset Sequence
____________
Table 5.1 Pin Status When RESET Pin Level is “L”
Status
Pin name
P0 to P3,
P6 to P10
Input port (high impedance)
b15
b0
000016
Data register(R0)
000016
Data register(R1)
000016
Data register(R2)
000016
Data register(R3)
000016
000016
Address register(A0)
Address register(A1)
000016
Frame base register(FB)
b19
b0
0000016
Interrupt table register(INTB)
Content of addresses FFFFE16 to FFFFC16
b15
Program counter(PC)
b0
000016
User stack pointer(USP)
000016
Interrupt stack pointer(ISP)
000016
Static base register(SB)
b15
b0
000016
AA
AAAAAA
AA
AA
AA
A
AA
AA
A
AA
AA
AAAAAA
AA
AAAAAAAAAAA
A
b15
b8
IPL
b7
U I
b0
O B S Z D C
Figure 5.3 CPU Register Status After Reset
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 37 of 458
Flag register(FLG)
5. Resets
M16C/29 Group
5.5 Voltage Detection Circuit
Note
VCC = 5 V is assumed in 5.5 Voltage Detection Circuit.
Voltage detection circuit in the M16C/29 Group, T-ver. and V-ver. cannot be used.
The voltage detection circuit has the reset level detection circuit and the low voltage detection circuit. The
reset level detection circuit monitors the voltage applied to the VCC pin. The MCU is reset if the reset level
detection circuit detects VCC is Vdet3 or below. Use bits VC27 and VC26 in the VCR2 register to determine
whether the individual circuit is enabled.
Use the reset level detection circuit for brown-out detection reset.
The low voltage detection circuit also monitors the voltage applied to the VCC pin. The low voltage detection circuit use the VC13 bit in the VCR1 register to detect VCC is above or below Vdet4. The low voltage
detection interrupt can be used in the voltage detection circuit.
VCR2 Register
RESET
b7 b6
Brown-out Detect Reset
(Hardware Reset 2
Release Wait Time)
1 shot
Reset level
detection circuit
Q
+
>Vdet3
E
CM10 Bit=1
(Stop Mode)
Internal Reset Signal
(“L” active)
+
>Vdet4
VCC
E
Low voltage
detection circuit
Figure 5.4 Voltage Detection Circuit Block
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
td(S-R)
>T
page 38 of 458
Noise Rejection
Low Voltage
Detect Signal
VCR1 Register
b3
VC13 Bit
5. Resets
M16C/29 Group
Voltage Detection Register 1
b7
b6
b5
b4
0 0 0 0
b3
b2
b1
b0
0 0 0
Symbol
VCR1
Address
001916
Bit Symbol
(b2-b0)
VC13
(b7-b4)
After Reset (2)
000010002
Function
Bit Name
RW
Reserved bit
Set to 0
RW
Low voltage monitor flag (1)
0:VCC < Vdet4
1:VCC ≥ Vdet4
RO
Reserved bit
Set to 0
RW
NOTES:
1. The VC13 bit is useful when the VC27 bit of VCR2 register is set to 1 (low voltage detection circuit enable).
The VC13 bit is always 1 (VCC≥ Vdet4) when the VC27 bit in the VCR2 register is set to 0 (low voltage
detection circuit disable).
2. This register does not change at software reset, watchdog timer reset and oscillation stop detection reset.
Voltage Detection Register 2 (1)
b7
b6
b5
b4
b3
b2
b1
b0
0 0 0 0 0 0
Symbol
VCR2
Address
001A16
Bit Name
Bit Symbol
(b5-b0)
VC26
VC27
After Reset (5)
0016
Reserved bit
Reset level monitor bit
(2, 3, 6)
Low voltage monitor
bit (4, 6)
Function
Set to 0
0: Disable reset level detection
circuit
1: Enable reset level detection
circuit
0: Disable low voltage
detection circuit
1: Enable low voltage
detection circuit
RW
RW
RW
RW
NOTES:
1. Write to this register after setting the PRC3 bit in the PRCR register to 1 (write enable).
2. Set the VC26 bit to 1 to use brown-out reset.
3. VC26 bit is disabled in stop mode. (The MCU is not reset even if the voltage input to Vcc pin becomes
lower than Vdet3.)
4. When the VC13 bit in the VCR1 register and D42 bit in the D4INT register are used or the D40 bit is set
to 1 (low voltage detection interrupt enable), set the VC27 bit to 1.
5. This register does not change at software reset, watchdog timer reset and oscillation stop detection
reset.
6. The detection circuit does not start operation until td(E-A) elapses after the VC26 bit or VC27 bit is set
to 1.
Figure 5.5 VCR1 Register and VCR2 Register
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 39 of 458
5. Resets
M16C/29 Group
Low Voltage Detection Interrupt Register
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
D4INT
(1)
Address
001F16
After Reset
0016
Bit Name
Bit Symbol
Function
RW
D40
Low voltage detection
interrupt enable bit (5)
0 : Disab le
1 : En able
RW
D41
STOP mode deactivation
control bit (4)
0: Disable (do not use the low
voltage detection interrupt to exit
stop mode)
1: Enable (use the low voltage
detection interrupt to exit stop
mode)
RW
D42
Voltage change detection flag 0: Not detected
(2)
1: Vdet4 passing detection
D43
WDT overflow detect flag
DF0
Sampling clock select bit
DF1
(b7-b6)
0: Not detected
1: Detected
b5b4
00 : CPU clock divided by 8
01 : CPU clock divided by 16
10 : CPU clock divided by 32
11 : CPU clock divided by 64
RW
(3)
RW
(3)
RW
RW
Nothing is assigned. If necessary set to 0. When read, the
content is 0
NOTES:
1. Write to this register after setting the PRC3 bit in the PRCR register to 1 (write enable).
2. Useful when the VC27 bit in the VCR2 register is set to 1 (low voltage detection circuit enabled). If the VC27
bit is set to 0 (low voltage detection circuit disable), the D42 bit is set to 0 (Not detect).
3. This bit is set to 0 by writing a 0 in a program. (Writing 1 has no effect.)
4. If the low voltage detection interrupt needs to be used to get out of stop mode again after once used for that
purpose, reset the D41 bit by writing a 0 and then a 1.
5. The D40 bit is effective when the VC27 bit in the VCR2 register is set to 1. To set the D40 bit to 1, follow the
procedure described below.
(1) Set the VC27 bit to 1.
(2) Wait for td(E-A) until the detection circuit is actuated.
(3) Wait for the sampling time (refer to Table 5.3 Sampling Clock Periods).
(4) Set the D40 bit to 1.
Figure 5.6 D4INT Register
VCC
Vdet4
Vdet3r
Vdet3
5.0V
5.0V
Vdet3s
VSS
RESET
Internal Reset Signal
VC13 bit in
VCR1 register
Undefined
Set to 1 by program (reset level detect circuit enable)
VC26 bit in
VCR2 register (1)
Undefined
VC27 bit in
VCR2 register
Undefined
Set to 1 by program
(low voltage detection circuit enable)
NOTES :
1. VC26 bit is invalid in stop mode. (the MCU is not reset even if input voltage of VCC pin
becomes lower than Vdet3).
Figure 5.7 Typical Operation of Brown-Out Detection Reset (Hardware Reset 2)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 40 of 458
5. Resets
M16C/29 Group
5.5.1 Low Voltage Detection Interrupt
If the D40 bit in the D4INT register is set to 1 (low voltge detection interrupt enabled), a low voltage
detection interrupt request is generated when voltage applied to the VCC pin is above or below Vdet4.
The low voltage detection interrupt shares the same interrupt vector with watchdog timer interrupt and
oscillation stop, re-oscillation detection interrupt.
Set the D41 bit in the D4INT register to 1 (enabled) to use the low voltage detection interrupt to exit stop
mode, set the D41 bit in the D4INT register to 1 (enable).
The D42 bit in the D4INT register is set to 1 (above or below Vdet4 detected) as soon as voltage applied
to the VCC pin goes above or below Vdet4 due to the voltage change. When the D42 bit setting changes
0 to 1, a low voltage detection interrupt is generated. Set the D42 bit to 0 (not detected) by program.
However, when the D41 bit is set to 1 and the MCU is in stop mode, a low voltage detection interrupt
request is generated, regardless of the D42 bit setting, if voltage applies to the VCC pin is detected to rise
above or drop below Vdet4. The MCU then exits stop mode.
Table 5.2 shows how a low voltage detection interrupt request is generated.
Bits DF1 and DF0 in the D4INT register determine sampling period that detects voltage applied to the
VCC pin rises above or drops below Vdet4. Table 5.3 shows sampling periods.
Table 5.2 Voltage Detection Interrupt Request Generation Conditions
Operation Mode
VC27 bit
D40 bit
D41 bit
Normal
operation
mode(1)
D42 bit
CM02 bit
0 to 1
Wait mode
(2)
1
0 to 1
1
Stop mode
(2)
1
0
VC13 bit
0 to 1
(3)
1 to 0
(3)
0 to 1
(3)
1 to 0
(3)
1
0 to 1
0
0 to 1
– : 0 or 1
NOTES:
1. The status except the wait mode and stop mode is handled as the normal mode. (Refer to 7. Clock generating circuit)
2. Refer to 5.5.2 Limitations on stop mode and 5.5.3 Limitations on wait mode.
3. An interrupt request for voltage reduction is generated a sampling time after the value of the VC13 bit has changed.
Refer to the Figure 5.9 for details.
Table 5.3 Sampling Clock Periods
CPU
clock
(MHz)
16
Sampling clock (µs)
DF1 to DF0=00
DF1 to DF0=01
DF1 to DF0=10
DF1 to DF0=11
(CPU clock divided by 8) (CPU clock divided by 16) (CPU clock divided by 32) (CPU clock divided by 64)
3.0
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
6.0
page 41 of 458
12.0
24.0
5. Resets
M16C/29 Group
Low voltage detection interrupt generation circuit
DF1, DF0
002
D42 bit is set to 0 (not detected) by
writing a 0 in a program. VC27 bit is
012
Low voltage detection circuit
102
D4INT clock(the
clock with which it
operates also in
wait mode)
VC27
1/8
1/2
1/2
1/2
set to 0 (low voltage detection circuit
disabled), the D42 bit is set to 0.
112
VC13
VCC
+
Vref
-
Noise
rejection
Noise rejection
circuit
Low voltage detection
signal
(Rejection wide:200 ns)
Watchdog
timer interrupt
signal
D42
“H” when VC27 bit = 0
(disabled)
Digital
filter
Low voltage
detection
D41
interrupt signal
CM10
Watchdog timer block
Oscillation stop,
re-oscillation
detection
interrupt signal
CM02
WAIT instruction (wait mode)
D43
Watchdog timer
underflow signal
D40
This bit is set to 0 (not detected) by writing a 0 by program.
Figure 5.8 Low Voltage Detection Interrupt Generation Block
VCC
VC13 bit
sampling
sampling
sampling
sampling
No low voltage detection interrupt signals are
generated when the D42 bit is 1.
Output of the digital filter (2)
D42 bit
Set to 0 by
program (not
detected)
Set to 0 by a
program (not
detected)
Low voltage detection
interrupt signal
NOTES:
1. D40 bit in the D4INT register is set to 1 (low voltage detection interrupt enabled).
2. Output of the digital filter shown in Figure 5.8.
Figure 5.9 Low voltage Detection Interrupt Generation Circuit Operation Example
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
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Non-maskable
interrupt signal
5. Resets
M16C/29 Group
5.5.2. Limitations on Stop Mode
When all the conditions below are met, the low voltage detection interrupt is generated and the MCU exits
stop mode as soon as the CM10 bit in the CM1 register is set to 1 (all clocks stopped).
• the VC27 bit in the VCR2 register is set to 1 (low voltage detection circuit enabled)
• the D40 bit in the D4INT register is set to 1 (low voltage detection interrupt enabled)
• the D41 bit in the D4INT register is set to 1 (low voltage detection interrupt is used to exit stop mode)
• the voltage applied to the VCC pin is higher than Vdet4 (the VC13 bit in the VCR1 register is 1)
Set the CM10 bit to 1 when the VC13 bit is set to set to 0 (VCC < Vdet4), if the MCU is configured to enter
stop mode when voltage applied to the VCC pin drops Vdet4 or below and to exit stop mode when the
voltage applied rises to Vdet4 or above.
5.5.3. Limitations on WAIT Instruction
When all the conditions below are met, the low voltage detection interrupt is generated and the MCU exits
wait mode as soon as WAIT instruction is executed.
• the CM02 bit in the CM0 register is set to 1 (stop peripheral function clock)
• the VC27 bit in the VCR2 register is set to 1 (low voltage detection circuit enabled)
• the D40 bit in the D4INT register is set to 1 (low voltage detection interrupt enabled)
• the D41 bit in the D4INT register is set to 1 (low voltage detection interrupt is used to exit wait mode)
• the voltage applied to the VCC pin is higher than Vdet4 (the VC13 bit in the VCR1 register is 1)
Execute the WAIT instruction when the VC13 bit is set to set to 0 (VCC < Vdet4), if the MCU is configured
to enter wait mode when voltage applied to the VCC pin drops Vdet4 or below and to exit wait mode when
the voltage applied rises to Vdet4 or above.
Rev. 1.12 Mar.30, 2007
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6. Processor Mode
M16C/29 Group
6. Processor Mode
The MCU supports single-chip mode only. Figures 6.1 and 6.2 show the associated registers.
Processor Mode Register 0 (1)
b7
b6
b5
b4
b3
0 0 0 0
b2
b1
b0
0 0 0
Symbol
PM0
Address
000416
Bit Symbol
After Reset
0016
Bit Name
Function
RW
(b2-b0)
Reserved bit
Set to 0
RW
PM03
Software reset bit
The MCU is reset when
this bit is set to 1. When read,
its content is 0.
RW
(b7-b4)
Reserved bit
Set to 0
RW
NOTES:
1. Set the PM0 register after the PRC1 bit in the PRCR register is set to 1 (write enable).
Processor Mode Register 1 (1)
b7
b6
b5
b4
b3
0 0 0 1
b2
b1
0
b0
Symbol
PM1
Address
000516
Bit Symbol
After Reset
000010002
Bit Name
Function
RW
Flash data block access
bit (2)
0: Disabled
1: Enabled (3)
RW
Reserved bit
Set to 0
RW
Watchdog timer function
select bit
0 : Watchdog timer interrupt
1 : Watchdog timer reset (4)
RW
(b3)
Reserved bit
Set to 1
RW
(b6-b4)
Reserved bit
Set to 0
RW
PM17
Wait bit (5)
0 : No wait state
1 : Wait state (1 wait)
RW
PM10
(b1)
PM12
NOTES:
1. Rewrite the PM1 register after the PRC1 bit in the PRCR register is set to 1 (write enable).
2. To access the two 2K-byte data spaces in data block A and data block B, set the PM10 bit to 1. The PM10
bit is not available in mask version.
3. When the FMR01 bit in the FMR0 register is set to 1 (enables CPU rewrite mode), the PM10 bit is
automatically set to 1.
4. Set the PM12 bit to 1 by program. (Writing 0 by program has no effect)
5. When the PM17 bit is set to 1 (wait state), one wait is inserted when accessing the internal RAM or the
internal ROM.
Figure 6.1 PM0 Register and PM1 Register
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6. Processor Mode
M16C/29 Group
Processeor Mode Register 2 (1)
b7
b6
b5
b4
b3
b2
b1
0
b0
Symbol
PM2
Bit Symbol
Address
001E16
After Reset
XXX00000 2
Bit Name
Function
RW
PM20
Specifying wait when
accessing SFR(2)
0: 2 waits
1: 1 wait
RW
PM21
System clock protective
bit(3,4)
0: Clock is protected by PRCR
register
1: Clock modification disabled
RW
PM22
WDT count source
protective bit(3,5)
0: CPU clock is used for the
watchdog timer count source
1: On-chip oscillator clock is used
for the watchdog timer count
source
RW
Reserved bit
Set to 0
RW
P85/NMI configuration bit(6,7)
0: P85 function (NMI disabled)
1: NMI function
RW
(b3)
PM24
(b7-b5)
Nothing is assigned. When write, set to 0.
When read, thecontent is undefined
NOTES:
1. Write to this register after setting the PRC1 bit in the PRCR register to 1 (write enable).
2. The PM20 bit becomes effective when PLC07 bit in the PLC0 register is set to 1 (PLL on). Change the PM20
bit when the PLC07 bit is set to 0 (PLL off). Set the PM20 bit to 0 (2 waits) when PLL clock > 16MHz.
3. Once this bit is set to 1, it cannot be cleared to 0 by program.
4. Writting to the following bits has no effect when the PM21 bit is set to 1:
CM02 bit in the CM0 register
CM05 bit in the CM0 register (main clock is not halted)
CM07 bit in the CM0 register (CPU clock source does not change)
CM10 bit in the CM1 register (stop mode is not entered)
CM11 bit in the CM1 register (CPU clock source does not change)
CM20 bit in the CM2 register (oscillation stop, re-oscillation detection function settings do not change)
All bits in the PLC0 register (PLL frequency synthesizer setting do not change)
Do not execute WAIT instruction when the PM21 bit is set to 1.
5. Setting the PM22 bit to 1 results in the following conditions:
• The on-chip oscillator continues oscillating even if the CM21 bit in the CM2 register is set to "0" (main clock or
PLL clock) (system clock of count source selected by the CM21 bit is valid)
• The on-chip oscillator starts oscillating, and the on-chip oscillator clock becomes the watchdog timer
count source.
• The CM10 bit in the CM1 register cannnot be written. (Writing 1 has no effect, stop mode is not entered.)
• The watchdog timer does not stop in wait mode.
6. For NMI function, the PM24 bit must be set to 1(NMI function). Once this bit is set to 1, it cannot be set to 0 by
program.
7. SD input is valid regardless of the PM24 setting.
Figure 6.2 PM2 Register
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REJ09B0101-0112
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6. Processor Mode
M16C/29 Group
The internal bus consists of CPU bus, memory bus, and peripheral bus. Bus Interface Unit (BIU) is used to
interfere with CPU, ROM/RAM, and perpheral functions by controling CPU bus, memory bus, and peripheral bus. Figure 6.3 shows the block diagram of the internal bus.
ROM
RAM
CPU address bus
CPU
CPU data bus
Memory address bus
BIU
Memory data bus
DMAC
Timer
WDT
ADC
CAN
CRC
.
.
Peripheral function
Serial I/O
SFR
Peripheral function
Periphral data bus
Clock
generation
circuit
Peripheral address bus
CPU clock
I/O
Figure 6.3 Bus Block Diagram
The number of bus cycle varies by the internal bus. Table 6.1 lists the accessible area and bus cycle.
Table 6.1 Accessible Area and Bus Cycle
Accessible Area
Bus Cycle
SFR
PM20 bit = 0 (2 waits)
PM20 bit = 1 (1 wait)
3 CPU clock cycles
2 CPU clock cycles
ROM/RAM
PM17 bit = 0 (no wait)
PM17 bit = 1 (1 wait)
1 CPU clock cycle
2 CPU clock cycles
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REJ09B0101-0112
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7. Clock Generation Circuit
M16C/29 Group
7. Clock Generation Circuit
The clock generation circuit contains four oscillator circuits as follows:
(1) Main clock oscillation circuit
(2) Sub clock oscillation circuit
(3) Variable on-chip oscillators
(4) PLL frequency synthesizer
Table 7.1 lists the specifications of the clock generation circuit. Figure 7.1 shows the clock generation
circuit. Figures 7.2 to 7.7 show clock-associated registers.
Table 7.1 Clock Generation Circuit Specifications
Item
Use of clock
Clock frequency
Main Clock
Oscillation Circuit
PLL Frequency
Sub Clock
Variable On-chip Oscillator
Synthesizer
Oscillation Circuit
- CPU clock source - CPU clock source - CPU clock source
- CPU clock source
- Peripheral function - Timer A, B's clock - Peripheral function clock source - Peripheral function clock
source
clock source
source
- CPU and peripheral function
clock sources when the main
clock stops oscillating
10 to 20 MHz
0 to 20 MHz
32.768 kHz
Selectable source frequency:
f1(ROC), f2(ROC), f3(ROC)
Selectable divider:
by 2, by 4, by 8
Usable oscillator
- Ceramic oscillator
- Crystal oscillator
- Crystal oscillator
Pins to connect
oscillator
XIN, XOUT
XCIN, XCOUT
Oscillation stop,
restart function
Available
Available
Oscillator status
after reset
Oscillating
Stopped
Other
Externally derived clock can be input
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REJ09B0101-0112
page 47 of 458
Available
Available
Oscillating
Stopped
(CPU clock source)
7. Clock Generation Circuit
M16C/29 Group
CCLK2-CCLK0=0002
CCLK2-CCLK0=0012
CCLK2-CCLK0=0102
CCLK2-CCLK0=0112
CCLK2-CCLK0=1002
fCAN
CAN module
system clock
divider
XCIN
PCLK5=0,CM01-CM00=002
PCLK5=0,CM01-CM00=012
I/O ports
Sub-clock
generating circuit
PCLK5=1,
CM01-CM00=002
XCOUT
CLKOUT
PCLK5=0,
CM01-CM00=102
fC32
1/32
CM04
f1
Sub-clock
PCLK0=1
f2
fC
Variable
on-chip
oscillator
CM21
f8
On-chip
oscillator
clock
PCLK0=0
f32
fAD
Oscillation
stop, reoscillation
detection
circuit
CM10=1(stop mode)
S Q
XIN
R
Main
clock
CM05
f1SIO
Main clock
generating circuit
PLL
clock
1
0
CM11
PCLK1=1
f2SIO
PCLK1=0
f8SIO
PLL
frequency
synthesizer
XOUT
PCLK5=0,
CM01-CM00=112
a
CM21=1
f32SIO
e b c
d
e
D4INT clock
CM07=0
CPU clock
fC
CM21=0
CM07=1
BCLK
CM02
S
WAIT instruction
Q
R
e
a
RESET
c
b
1/2
1/2
1/2
1/2
1/4
1/2
1/2
1/8
Software reset
NMI
CM06=0
CM17, CM16=102
CM06=0
CM17, CM16=002
Oscillation stop, re-oscillation detection circuit
CM27=0
CM27=1
Details of divider
Variable On-chip Oscillator
f1(ROC)
Charge,
discharge
circuit
d
CM06=0
CM17, CM16=012
CM00, CM01, CM02, CM04, CM05, CM06, CM07: Bits in the CM0 register
CM10, CM11, CM16, CM17: Bits in the CM1 register
PCLK0, PCLK1, PCLK5: Bits in the PCLKR register
CM21, CM27: Bits in the CM2 register
Pulse generation
circuit for clock
edge detection
and charge,
discharge control
CM06=0
CM17, CM16=112
CM06=1
Interrupt request level judgment output
Main
clock
1/32
1/16
Reset
generating
circuit
Oscillation stop
detection reset
Oscillation stop,
re-oscillation
detection interrupt
generating circuit
Oscillation stop,
re-oscillation
detection signal
f2(ROC)
ROCR1, ROCR0=002
ROCR1,ROCR0=012
1/2
1/2
1/2
f3(ROC)
1/2
1/4
ROCR3, ROCR2=112
ROCR1, ROCR0=112
ROCR3, ROCR2=102
ROCR3, ROCR2=012
CM21 switch signal
PLL frequency synthesizer
Programmable
counter
Main clock
Phase
comparator
Charge
pump
Voltage
control
oscillator
(VCO)
Internal lowpass filter
Figure 7.1 Clock Generation Circuit
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 48 of 458
1/8
1/2
PLL clock
On-chip
oscillator
clock
7. Clock Generation Circuit
M16C/29 Group
System Clock Control Register 0 (1)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
CM0
Address
000616
Bit Symbol
CM00
After Reset
010010002
Bit Name
Clock output function
select bit
Function
See Table 7.3
RW
RW
CM01
CM02
Wait Mode peripheral function 0: Do not stop peripheral function clock in wait mode
clock stop bit (10)
1: Stop peripheral function clock in wait mode (8)
CM03
XCIN-XCOUT drive capacity 0: LOW
select bit (2)
1: HIGH
0: I/O port P8 6, P87
Port XC select bit (2)
1: XCIN-XCOUT generation function(9)
CM04
RW
(4)
(5)
RW
RW
RW
CM05
Main clock stop bit
(3, 10, 12, 13)
0: On
1: Off
CM06
Main clock division select
bit 0 (7, 13, 14)
0: CM16 and CM17 valid
1: Division by 8 mode
RW
CM07
System clock select bit
0: Main clock, PLL clock, or on-chip oscillator clock
1: Sub-clock
RW
(6, 10, 11, 12)
RW
NOTES:
1. Write to this register after setting the PRC0 bit in the PRCR register to 1 (write enable).
2. The CM03 bit is set to 1 (high) when the CM04 bit is set to 0 (I/O port) or the MCU goes to a stop mode.
3. This bit is provided to stop the main clock when the low power dissipation mode or on-chip oscillator low power dissipation mode
is selected. This bit cannot be used for detection as to whether the main clock stopped or not. To stop the main clock, the
following setting is required:
(1) Set the CM07 bit to 1 (Sub-clock select) or the CM21 bit in the CM2 register to 1 (on-chip oscillator select) with the subclock stably oscillating.
(2) Set the CM20 bit in the CM2 register to 0 (Oscillation stop, re-oscillation detection function disabled).
(3) Set the CM05 bit to 1 (Stop).
4. During external clock input, set the CM05 bit to 0 (On).
5. When CM05 bit is set to 1, the XOUT pin goes "H". Futhermore, because the internal feedback resistor remains connectes,
the XIN pin is pulled "H" to the same level as XOUT via the feedback resistor.
6. After setting the CM04 bit to 1 (XCIN-XCOUT oscillator function), wait until the sub-clock oscillates stably before switching
the CM07 bit from 0 to 1 (sub-clock).
7. When entering stop mode from high or middle speed mode, on-chip oscillator mode or on-chip oscillator low power mode, the
CM06 bit is set to 1 (divided-by-8 mode).
8. The fC32 clock does not stop. During low speed or low power dissipation mode, do not set this bit to 1(peripheral clock turned
off in wait mode).
9. To use a sub-clock, set this bit to 1. Also, make sure ports P86 and P87 are directed for input, with no pull-ups.
10. When the PM21 bit in the PM2 register is set to 1 (clock modification disable), writing to bits CM02, CM05, and CM07 has
no effect.
11. If the PM21 bit needs to be set to 1, set the CM07 bit to 0 (main clock) before setting it.
12. To use the main clock a the clock source for the CPU clock, follow the procedure below.
(1) Set the CM05 bit to 0 (oscillate).
(2) Wait the main clock oscillation stabilized.
(3) Set all bits CM11, CM21, and CM07 to 0.
13. When the CM21 bit is set to 0 (on-chip oscillaor turned off) and the CM05 bit is set to 1 (main clock turned off), the CM06 bit
is fixed to 1 (divide-by-8 mode) and the CM15 bit is fixed to 1 (drive capability High).
14. To return from on-chip oscillator mode to high-speed or middle-speed mode set both bits CM06 and CM15 to 1.
Figure 7.2 CM0 Register
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 49 of 458
7. Clock Generation Circuit
M16C/29 Group
System Clock Control Register 1 (1)
b7
b6
b5
b4
b3
b2
0
0
0
b1
b0
Symbol
CM1
Address
0007 16
Bit Symbol
After Reset
00100000 2
Bit Name
Function
RW
All clock stop control bit
0 : Clock on
1 : All clocks off (stop mode)
RW
(6, 7)
System clock select bit 1
0 : Main clock
1 : PLL clock (5)
RW
(b4-b2)
Reserved bit
Set to 0
RW
CM15
XIN-XOUT drive capacity
select bit (2)
0 : LOW
1 : HIGH
RW
CM16
Main clock division
select bits (3)
0 0 : No division mode
0 1 : Division by 2 mode
1 0 : Division by 4 mode
1 1 : Division by 16 mode
CM10
CM11
(4, 6)
CM17
b7 b6
RW
RW
NOTES:
1. Write to this register after setting the PRC0 bit in the PRCR register to 1 (write enable).
2. When entering stop mode from high or middle speed mode, or when the CM05 bit is set to 1 (main clock
turned off) in low speed mode, the CM15 bit is set to 1 (drive capability high).
3. Effective when the CM06 bit is 0 (bits CM16 and CM17 enable).
4. If the CM10 bit is 1 (stop mode), XOUT goes “H” and the internal feedback resistor is disconnected. The XCIN
and XCOUT pins are placed in the high-impedance state. When the CM11 bit is set to 1 (PLL clock), or the
CM20 bit in the CM2 register is set to 1 (oscillation stop, re-oscillation detection function enabled), do not set
the CM10 bit to 1.
5. After setting the PLC07 bit in the PLC0 register to 1 (PLL operation), wait until tsu (PLL) elapses before setting
the CM11 bit to 1 (PLL clock).
6. When the PM21 bit in the PM2 register is set to 1 (clock modification disable), writing to bits CM10, CM11 has
no effect. When the PM22 bit in the PM2 register is set to 1 (watchdog timer count source is on-chip oscillator
clock), writing to the CM10 bit has no effect.
7. Effective when CM07 bit is 0 and CM21 bit is 0 .
Figure 7.3 CM1 Register
On-chip Oscillator Control Register
b7
b6
b5
b4
b3
b2
b1
b0
0 0 0
(1)
Symbol
ROCR
Bit Symbol
ROCR0
Address
025C 16
Bit Name
Frequency select bits
ROCR1
ROCR2
Divider select bits
ROCR3
(b6-b4)
(b7)
After Reset
X0000101 2
Reserved bit
Function
b1 b0
0 0: f1 (ROC)
0 1: f2 (ROC)
1 0: Do not set to this value
1 1: f3 (ROC)
b3 b2
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REJ09B0101-0112
page 50 of 458
RW
RW
0 0: Do not set to this value
0 1: divide by 2
1 0: divide by 4
1 1: divide by 8
RW
Set to 0
RW
Nothing is assigned. When write, set to 0. When read, its
content is undefined
NOTE:
1. Write to this register after setting the PRC0 bit in the PRCR register to 1 (write enable).
Figure 7.4 ROCR Register
RW
RW
7. Clock Generation Circuit
M16C/29 Group
Oscillation Stop Detection Register (1)
b7
b6
b5
b4
b3
b2
b1
b0
0 0
Symbol
CM2
Address
000C 16
After Reset
0X000010 2(11)
Bit Symbol
Bit Name
CM20
Oscillation stop, reoscillation detection bit
0: Oscillation stop, re-oscillation
detection function disabled
1: Oscillation stop, re-oscillation
detection function enabled
CM21
System clock select bit 2
0: Main clock or PLL clock
1: On-chip oscillator clock
(On-chip oscillator oscillating)
CM22
Oscillation stop, reoscillation detection flag
0: Main clock stop,or re-oscillation
not detected
1: Main clock stop,or re-oscillation
detected
RW
XIN monitor flag
0: Main clock oscillating
1: Main clock not oscillating
RO
(b5-b4)
Reserved bit
Set to 0
RW
(b6)
Nothing is assigned. When write, set to 0. When read, its
content is undefined
(7, 9, 10, 11)
(2, 3, 6, 8, 11, 12 )
(4)
CM23
CM27
(5)
Function
Operation select bit
0: Oscillation stop detection reset
(when an oscillation stop, 1: Oscillation stop, re-oscillation
re-oscillation is detected)
detection interrupt
RW
RW
RW
RW
(11)
NOTES:
1. Write to this register after setting the PRC0 bit in the PRCR register to 1 (write enable).
2. When the CM20 bit is 1 (oscillation stop, re-oscillation detection function enabled), the CM27 bit is set to 1
(oscillation stop, re-oscillation detection interrupt), and the CPU clock source is the main clock, the CM21 bit is
automatically set to 1 (on-chip oscillator clock) if the main clock stop is detected.
3. If the CM20 bit is set to 1 and the CM23 bit is set to 1 (main clock not oscillating), do not set the CM21 bit to 0.
4. This flag is set to 1 when the main clock is detected to have stopped or when the main clock is detected
to have restarted oscillating. When this flag changes state from 0 to 1, an oscillation stop, reoscillation restart
detection interrupt is generated. Use this flag in an interrupt routine to discriminate the causes of interrupts
between the oscillation stop, reoscillation detection interrupts and the watchdog timer interrupt. The flag is
cleared to 0 by writing 0 by program. (Writing 1 has no effect. Nor is it cleared to 0 by an oscillation stop or an
oscillation restart detection interrupt request acknowledged.) If when the CM22 bit is set to 1 an oscillation
stoppage or an oscillation restart is detected, no oscillation stop, reoscillation restart detection interrupts are
generated.
5. Read the CM23 bit in an oscillation stop, re-oscillation detection interrupt handling routine to determine the
main clock status.
6. Effective when the CM07 bit in the CM0 register is set to 0.
7. When the PM21 bit in the PM2 register is 1 (clock modification disabled), writing to the CM20 bit has no effect.
8. When the CM20 bit is set to 1 (oscillation stop, re-oscillation detection function enabled), the CM27 bit is set 1
(oscillation stop, re-oscillation detection interrupt), and the CM11 bit is 1 (the CPU clock source is PLL clock),
the CM21 bit remains unchanged even when main clock stop is detected. If the CM22 bit is set to 0 under
these conditions, oscillation stop, re-oscillation detection interrupt occur at main clock stop detection; it is,
therefore, necessary to set the CM21 bit to 1 (on-chip oscillator clock) inside the interrupt routine.
9. Set the CM20 bit to 0 (disable) before entering stop mode. After exiting stop mode, set the CM20 bit back to 1
(enable).
10. Set the CM20 bit to 0 (disable) before setting the CM05 bit in the CM0 register.
11. Bits CM20, CM21 and CM27 do not change at oscillation stop detection reset.
12. When the CM21 bit is set to 0 (on-chip oscillator turned off) and the CM05 bit is set to 1 (main clock turned
off), the CM06 bit is fixed to 1 (divide-by-8 mode) and the CM15 bit is fixed to 1 (drive capability High).
Figure 7.5 CM2 Register
Rev. 1.12 Mar.30, 2007
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7. Clock Generation Circuit
M16C/29 Group
Peripheral Clock Select Register (1)
b7
b6
b5
0 0
b4
b3
b2
b1
b0
0 0 0
Symbol
PCLKR
Address
025E16
After Reset
000000112
Bit Symbol
Bit Name
PCLK0
Timers A, B clock select bit
(Clock source for the timers A,
B, the timer S, the dead timer,
SI/O3, SI/O4 and multi-master
I2C bus)
0: f2
1: f1
RW
PCLK1
SI/O clock select bit
(Clock source for UART0 to
UART2)
0: f2SIO
1: f1SIO
RW
(b4-b2)
Reserved bit
Set to 0
RW
PCLK5
Clock output function
expansion select bit
Refer to Table 7.3
RW
(b7-b6)
Reserved bit
Set to 0
RW
Function
RW
NOTE:
1. Write to this register after setting the PRC0 bit in PRCR register to 1 (write enable).
Processeor Mode Register 2 (1)
b7
b6
b5
b4
b3
0
b2
b1
b0
Symbol
PM2
Address
001E16
Bit Symbol
After Reset
XXX00000 2
Bit Name
Function
RW
PM20
Specifying wait when
accessing SFR(2)
0: 2 waits
1: 1 wait
RW
PM21
System clock protective
bit(3,4)
0: Clock is protected by PRCR
register
1: Clock modification disabled
RW
PM22
WDT count source
protective bit(3,5)
0: CPU clock is used for the
watchdog timer count source
1: On-chip oscillator clock is used
for the watchdog timer count
source
RW
Reserved bit
Set to 0
RW
P85/NMI configuration bit(6,7)
0: P85 function (NMI disabled)
1: NMI function
RW
(b3)
PM24
(b7-b5)
Nothing is assigned. When write, set to 0.
When read, thecontent is undefined
NOTES:
1. Write to this register after setting the PRC1 bit in the PRCR register to 1 (write enable).
2. The PM20 bit becomes effective when PLC07 bit in the PLC0 register is set to 1 (PLL on). Change the PM20
bit when the PLC07 bit is set to 0 (PLL off). Set the PM20 bit to 0 (2 waits) when PLL clock > 16MHz.
3. Once this bit is set to 1, it cannot be cleared to 0 by program.
4. Writting to the following bits has no effect when the PM21 bit is set to 1:
CM02 bit in the CM0 register
CM05 bit in the CM0 register (main clock is not halted)
CM07 bit in the CM0 register (CPU clock source does not change)
CM10 bit in the CM1 register (stop mode is not entered)
CM11 bit in the CM1 register (CPU clock source does not change)
CM20 bit in the CM2 register (oscillation stop, re-oscillation detection function settings do not change)
All bits in the PLC0 register (PLL frequency synthesizer setting do not change)
Do not execute WAIT instruction when the PM21 bit is set to 1.
5. Setting the PM22 bit to 1 results in the following conditions:
• The on-chip oscillator continues oscillating even if the CM21 bit in the CM2 register is set to "0" (main clock or
PLL clock) (system clock of count source selected by the CM21 bit is valid)
• The on-chip oscillator starts oscillating, and the on-chip oscillator clock becomes the watchdog timer
count source.
• The CM10 bit in the CM1 register cannnot be written. (Writing 1 has no effect, stop mode is not entered.)
• The watchdog timer does not stop in wait mode.
6. For NMI function, the PM24 bit must be set to 1(NMI function). Once this bit is set to 1, it cannot be set to 0 by
program.
7. SD input is valid regardless of the PM24 setting.
Figure 7.6 PCLKR Register and PM2 Register
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7. Clock Generation Circuit
M16C/29 Group
PLL Control Register 0
b7
b6
b5
b4
b3
b2
b1
(1,2)
Symbol
PLC0
b0
0 0 1
Bit
Symbol
PLC00
Address
001C16
After Reset
0001X0102
Bit Name
PLL multiplying factor
(3)
select bit
PLC01
PLC02
Function
b2 b1b0
0 0 0: Do not set
0 0 1: Multiply by 2
0 1 0: Multiply by 4
0 1 1:
1 0 0:
1 0 1: Do not set
1 1 0:
1 1 1:
RW
RW
RW
RW
(b3)
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined
(b4)
Reserved bit
Set to 1
RW
(b6-b5) Reserved bit
Set to 0
RW
0: PLL Off
1: PLL On
RW
PLC07
Operation enable bit (4)
NOTES:
1. Write to this register after setting the PRC0 bit in the PRCR register to 1 (write enable).
2. When the PM21 bit in the PM2 register is 1 (clock modification disable), writing to this register has no effect.
3. These three bits can only be modified when the PLC07 bit is set to 0 (PLL turned off). The value once written to
this bit cannot be modified.
4. Before setting this bit to 1 , set the CM07 bit to 0 (main clock), set bits CM17 to CM16 bits to 002 (main
clock undivided mode), and set the CM06 bit to 0 (CM16 and CM17 bits enable).
CAN0 Clock Select Register (1)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
CCLKR
Bit Symbol
Address
025F16
0016
Bit Name
Function
RW
b2 b1 b0
CCLK0
CCLK1
After Reset
CAN0 clock select bits(2)
CCLK2
0 0 0 No division
0 0 1: Divide-by-2
0 1 0: Divide-by-4
0 1 1: Divide-by-8
1 0 0: Divide-by-16
1 0 1:
1 1 0:
Inhibited
1 1 1:
CCLK3
CAN0 CPU interface
sleep bit(3)
(b7-b4)
Nothing is assigned. If necessary, set to 0. When read,
the content is 0
0: CAN0 CPU interface operating
1: CAN0 CPU interface in sleep
RW
RW
RW
RW
RW
NOTES:
1. Write to this register after setting the PRC0 bit in the PRCR register to 1 (write enable).
2. Configuration of bits CCLK2 to CCLK0 can be done only when the Reset bit in the C0CTLR register is set to 1
(Reset/Initialization mode).
3. Before setting this bit to 1(CAN0 CPU interface in sleep), set the Sleep bit in C0CTLR register to 1 (Sleep
mode).
Figure 7.7 PLC0 Register and CCLKR register
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7. Clock Generation Circuit
M16C/29 Group
The following describes the clocks generated by the clock generation circuit.
7.1 Main Clock
The main clock is generated by the main clock oscillation circuit. This clock is used as the clock source for
the CPU and peripheral function clocks. The main clock oscillator circuit is configured by connecting a
resonator between the XIN and XOUT pins. The main clock oscillator circuit contains a feedback resistor,
which is disconnected from the oscillator circuit during stop mode in order to reduce the amount of power
consumed in the chip. The main clock oscillator circuit may also be configured by feeding an exter nally
generated clock to the XIN pin. Figure 7.8 shows the examples of main clock connection circuit.
The power consumption in the chip can be reduced by setting the CM05 bit in the CM0 register to 1 (main
clock oscillator circuit turned off) after switching the clock source for the CPU clock to a sub clock or on-chip
oscillator clock. In this case, XOUT goes “H”. Furthermore, because the internal feedback resistor remains
on, XIN is pulled “H” to XOUT via the feedback resistor.
During stop mode, all clocks including the main clock are turned off. Refer to “power control”.
If the main clock is not used, it is recommended to connect the XIN pin to VCC to reduce power consumption during reset.
MCU
(Built-in Feedback Resistor)
CIN
MCU
(Built-in Feedback Resistor)
XIN
External Clock
XIN
VCC
VSS
Oscillator
XOUT
Rd(1)
COUT
VSS
XOUT
Open
NOTE:
1. Insert a damping resistor if required. Resistance value varies depending on the oscillator setting.
Use resistance value recommended by the oscillator manufacturer. If the oscillator manufacturer
recommends that a feedback resistor be added to the chip externally, insert a feedback resistor
between XIN and XOUT.
2. The external clock should not be stopped when it is connected to the XIN pin and the main clock is
selected as the CPU clock.
Figure 7.8 Examples of Main Clock Connection Circuit
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7. Clock Generation Circuit
M16C/29 Group
7.2 Sub Clock
The sub clock is generated by the sub clock oscillation circuit. This clock is used as the clock source for the
CPU clock, as well as the timer A and timer B count sources.
The sub clock oscillator circuit is configured by connecting a crystal resonator between the XCIN and XCOUT
pins. The sub clock oscillator circuit contains a feedback resistor, which is disconnected from the oscillator
circuit during stop mode in order to reduce the amount of power consumed in the chip. The sub clock
oscillator circuit may also be configured by feeding an externally generated clock to the XCIN pin. Figure
7.9 shows the examples of sub clock connection circuit.
After reset, the sub clock is turned off. At this time, the feedback resistor is disconnected from the oscillator
circuit.
To use the sub clock for the CPU clock, set the CM07 bit in the CM0 register to 1 (sub clock) after the sub
clock becomes oscillating stably.
During stop mode, all clocks including the sub clock are turned off. Refer to “power control”.
MCU
(Built-in Feedback Resistor)
CCIN
MCU
(Built-in Feedback Resistor)
XCIN
External Clock
XCIN
VCC
VSS
Oscillator
XCOUT
RCd(1)
CCOUT
VSS
XCOUT
Open
NOTE:
1. Place a damping resistor if required. Resistance values vary depending on the oscillator setting.
Use values recommended by each oscillator manufacturer.
Place a feedback resistor between XCIN and XCOUT if the oscillator manufacturer recommends
placing the resistor externally.
Figure 7.9 Examples of Sub Clock Connection Circuit
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7. Clock Generation Circuit
M16C/29 Group
7.3 On-chip Oscillator Clock
This clock is supplied by a variable on-chip oscillator. This clock is used as the clock source for the CPU
and peripheral function clocks. In addition, if the PM22 bit in the PM2 register is 1 (on-chip oscillator clock
for the watchdog timer count source), this clock is used as the count source for the watchdog timer (Refer
to 10. Watchdog Timer • Count source protective mode”).
After reset, the on-chip oscillator clock divided by 16 is used for the CPU clock. It can also be turned on by
setting the CM21 bit in the CM2 register to 1 (on-chip oscillator clock), and is used as the clock source for
the CPU and peripheral function clocks. If the main clock stops oscillating when the CM20 bit in the CM2
register is 1 (oscillation stop, re-oscillation detection function enabled) and the CM27 bit is 1 (oscillation
stop, re-oscillation detection interrupt), the on-chip oscillator automatically starts operating, supplying the
necessary clock for the MCU.
7.4 PLL Clock
The PLL clock is generated from the main clock by a PLL frequency synthesizer. This clock is used as the
clock source for the CPU and peripheral function clocks. After reset, the PLL clock is turned off. The PLL
frequency synthesizer is activated by setting the PLC07 bit to 1 (PLL operation). When the PLL clock is
used as the clock source for the CPU clock, wait tsu(PLL) for the PLL clock to be stable, and then set the
CM11 bit in the CM1 register to 1.
Before entering wait mode or stop mode, be sure to set the CM11 bit to 0 (CPU clock source is the main
clock). Furthermore, before entering stop mode, be sure to set the PLC07 bit in the PLC0 register to 0 (PLL
stops). Figure 7.10 shows the procedure for using the PLL clock as the clock source for the CPU.
The PLL clock frequency is determined by the equation below.
PLL clock frequency=f(XIN) X (multiplying factor set by bits PLC02 to PLC00 in the PLC0 register
(However, 10 MHz ≤ PLL clock frequency ≤ 20 MHz)
Bits PLC02 to PLC00 can be set only once after reset. Table 7.2 shows the example for setting PLL clock
frequencies.
Table 7.2 Example for Setting PLL Clock Frequencies
XIN
(MHz)
PLC02
PLC01
PLC00
Multiplying factor
10
5
0
0
0
1
1
0
2
4
NOTE:
1. 10MHz ≤ PLL clock frequency ≤ 20MHz.
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PLL clock
(MHz)(1)
20
7. Clock Generation Circuit
M16C/29 Group
START
Set the CM07 bit to 0 (main clock), bits CM17 and CM16 to
002(main clock undivided), and the CM06 bit to 0
(bits CM17 and CM16 enabled). (1)
Set bits PLC02 to PLC00 (multiplying factor).
(To select a 16 MHz or higher PLL clock)
Set the PM20 bit to 0 (2-wait states).
Set the PLC07 bit to 1 (PLL operation).
Wait until the PLL clock becomes stable (tsu(PLL)).
Set the CM11 bit to 1 (PLL clock for the CPU clock source).
END
NOTE:
1. PLL operation mode can be entered from high speed mode.
Figure 7.10 Procedure to Use PLL Clock as CPU Clock Source
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7. Clock Generation Circuit
M16C/29 Group
7.5 CPU Clock and Peripheral Function Clock
The CPU clock is used to operate the CPU and peripheral function clocks are used to operate the peripheral
functions.
7.5.1 CPU Clock
This is the operating clock for the CPU and watchdog timer.
The clock source for the CPU clock can be chosen to be the main clock, sub clock, on-chip oscillator clock
or the PLL clock.
If the main clock or on-chip oscillator clock is selected as the clock source for the CPU clock, the selected
clock source can be divided by 1 (undivided), 2, 4, 8 or 16 to produce the CPU clock. Use the CM06 bit in
CM0 register and bits CM17 to CM16 in CM1 register to select the divide-by-n value.
When the PLL clock is selected as the clock source for the CPU clock, the CM06 bit should be set to 0 and
bits CM17 and CM16 to 002 (undivided).
After reset, the on-chip oscillator clock divided by 16 provides the CPU clock.
Note that when entering stop mode from high or middle speed mode, on-chip oscillator mode or on-chip
oscillator low power dissipation mode, or when the CM05 bit in the CM0 register is set to 1 (main clock
turned off) in low-speed mode, the CM06 bit in the CM0 register is set to 1 (divide-by-8 mode).
7.5.2 Peripheral Function Clock(f1, f2, f8, f32, f1SIO, f2SIO, f8SIO, f32SIO, fAD, fC32, fCAN0)
These are operating clocks for the peripheral functions.
Of these, fi (i = 1, 2, 8, 32) and fiSIO are derived from the main clock, PLL clock, or on-chip oscillator clock
divided by i. The clock fi is used for Timer A, Timer B, SI/O3 and SI/O4 while fiSIO is used for UART0 to
UART2. Additionally, the f1 and f2 clocks are also used for dead time timer, Timer S, multi-master I2C bus.
The fAD clock is produced from the main clock, PLL clock or on-chip oscillator clock, and is used for the A/
D converter.
The fCAN0 clock is derived from the main clock, PLL clock or on-chip oscillator clock devided by 1 (undivided), 2, 4, 8, or 16, and is used for the CAN module.
When the WAIT instruction is executed after setting the CM02 bit in the CM0 register to 1 (peripheral
function clock turned off during wait mode), or when the MCU is in low power dissipation mode, the fi, fiSIO,
fAD, and fCAN0 clocks are turned off. (Note 1)
The fC32 clock is produced from the sub clock, and is used for timers A and B. This clock can only be used
when the sub clock is on.
Note 1: fCAN0 clock stops at "H" in CAN0 sleep mode.
7.5.3 ClockOutput Function
The f1, f8, f32 or fC clock can be output from the CLKOUT pin. Use the PCLK5 bit in the PCLKR register
and bits CM01 to CM00 in the CM0 register to select. Table 7.3 shows the function of the CLKOUT pin.
Table 7.3 The function of the CLKOUT pin
PCLK5
CM01
CM00
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
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The function of the CLKOUT pin
I/O port P90
fC
f8
f32
f1
Do not set
Do not set
Do not set
7. Clock Generation Circuit
M16C/29 Group
7.6 Power Control
There are three power control modes. In this chapter, all modes other than wait and stop modes are
referred to as normal operation mode.
7.6.1 Normal Operation Mode
Normal operation mode is further classified into seven modes.
In normal operation mode, because the CPU clock and the peripheral function clocks both are on, the
CPU and the peripheral functions are operating. Power control is exercised by controlling the CPU clock
frequency. The higher the CPU clock frequency, the greater the processing capability. The lower the
CPU clock frequency, the smaller the power consumption in the chip. If the unnecessary oscillator circuits
are turned off, the power consumption is further reduced.
Before the clock sources for the CPU clock can be switched over, the new clock source must be in stable
oscillation. If the new clock source is the main clock, sub clock or PLL clock, allow a sufficient wait time
in a program until it becomes oscillating stably.
Note that operation modes cannot be changed directly from low power dissipation mode to on-chip oscillator mode or on-chip oscillator low power dissipation mode. Nor can operation modes be changed
directly from on-chip oscillator mode or on-chip oscillator low power dissipation mode to low power dissipation mode.
When the CPU clock source is changed from the on-chip oscillator to the main clock, change the operation mode to the medium speed mode (divided by 8 mode) after the clock was divided by 8 (the CM06 bit
in the CM0 register was set to 1) in the on-chip oscillator mode.
7.6.1.1 High-speed Mode
The main clock divided by 1 provides the CPU clock. If the sub clock is on, fC32 can be used as the
count source for timers A and B.
7.6.1.2 PLL Operation Mode
The main clock multiplied by 2 or 4 provides the PLL clock, and this PLL clock serves as the CPU
clock. If the sub clock is on, fC32 can be used as the count source for timers A and B. PLL operation
mode can be entered from high speed mode. If PLL operation mode is to be changed to wait or stop
mode, first go to high speed mode before changing.
7.6.1.3 Medium-speed Mode
The main clock divided by 2, 4, 8 or 16 provides the CPU clock. If the sub clock is on, fC32 can be used
as the count source for timers A and B.
7.6.1.4 Low-speed Mode
The sub clock provides the CPU clock. The main clock is used as the clock source for the peripheral
function clock when the CM21 bit is set to 0 (on-chip oscillator turned off), and the on-chip oscillator
clock is used when the CM21 bit is set to 1 (on-chip oscillator oscillating).
The fC32 clock can be used as the count source for timers A and B.
7.6.1.5 Low Power Dissipation Mode
In this mode, the main clock is turned off after being placed in low speed mode. The sub clock
provides the CPU clock. The fC32 clock can be used as the count source for timers A and B. Peripheral function clock can use only fC32.
Simultaneously when this mode is selected, the CM06 bit in the CM0 register becomes 1 (divided by
8 mode). In the low power dissipation mode, do not change the CM06 bit. Consequently, the medium
speed (divided by 8) mode is to be selected when the main clock is operated next.
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7. Clock Generation Circuit
M16C/29 Group
7.6.1.6 On-chip Oscillator Mode
The selected on-chip oscillator clock divided by 1 (undivided), 2, 4, 8 or 16 provides the CPU clock.
The on-chip oscillator clock is also the clock source for the peripheral function clocks. If the sub clock
is on, fC32 can be used as the count source for timers A and B. The on-chip oscillator frequency can be
selected by bits ROCR3 to ROCR0 in the ROCR register. When the operation mode is returned to the
high and medium speed modes, set the CM06 bit to 1 (divided by 8 mode).
7.6.1.7 On-chip Oscillator Low Power Dissipation Mode
The main clock is turned off after being placed in on-chip oscillator mode. The CPU clock can be selected as in the on-chip oscillator mode. The on-chip oscillator clock is the clock source for the peripheral function clocks. If the sub clock is on, fC32 can be used as the count source for timers A and B.
Table 7.4 Setting Clock Related Bit and Modes
Modes
PLL operation mode
High-speed mode
Mediumdivided by 2
speed
divided by 4
mode
divided by 8
divided by 16
Low-speed mode
Low power dissipation mode
divided by 1
On-chip
divided by 2
oscillator
divided by 4
mode(3)
divided by 8
divided by 16
On-chip oscillator low power
dissipation mode
CM2 Register
CM21
0
0
0
0
0
0
1
1
1
1
1
1
CM1 Register
CM11
CM17, CM16
1
002
0
002
0
012
0
102
0
0
112
002
012
102
11 2
(2)
CM07
0
0
0
0
0
0
1
1
0
0
0
0
0
0
CM0 Register
CM06
CM05
0
0
0
0
0
0
0
0
0
1
0
0
0
1(1)
1(1)
0
0
0
0
0
0
1
0
0
0
(2)
1
CM04
1
1
NOTES:
1. When the CM05 bit is set to 1 (main clock turned off) in low-speed mode, the mode goes to low power
dissipation mode and CM06 bit is set to 1(divided by 8 mode) simultaneously.
2. The divide-by-n value can be selected the same way as in on-chip oscillator mode.
3. On-chip oscillator frequency can be any of those described in the section 7.6.1.6 On-chip Oscillator Mode.
7.6.2 Wait Mode
In wait mode, the CPU clock is turned off, so are the CPU (because operated by the CPU clock) and the
watchdog timer. However, if the PM22 bit in the PM2 register is 1 (on-chip oscillator clock for the watchdog timer count source), the watchdog timer remains active. Because the main clock, sub clock, on-chip
oscillator clock and PLL clock all are on, the peripheral functions using these clocks keep operating.
7.6.2.1 Peripheral Function Clock Stop Function
When the CM02 bit is 1 (peripheral function clocks turned off during wait mode), f1, f2, f8, f32, f1SIO,
f2SIO, f8SIO, f32SIO, and fAD stop running in wait mode to reduce power consumption. However, fC32
remains active.
7.6.2.2 Entering Wait Mode
The MCU enters wait mode by executing the WAIT instruction.
When the CM11 bit is set to 1 (CPU clock source is the PLL clock), be sure to clear the CM11 bit to 0
(CPU clock source is the main clock) before going to wait mode. The power consumption of the chip
can be reduced by clearing the PLC07 bit to 0 (PLL stops).
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7. Clock Generation Circuit
M16C/29 Group
7.6.2.3 Pin Status During Wait Mode
Table 7.5 lists pin status during wait mode.
Table 7.5 Pin Status in Wait Mode
Pin
Status
I/O ports
When fC selected
CLKOUT
When f1, f8, f32 selected
Retains status before wait mode
Does not stop
Does not stop when the CM02 bit is set to 0
Retains status before wait mode when the CM02 bit is set to 1
7.6.2.4 Exiting Wait Mode
______
The MCU exits from wait mode by a hardware reset, NMI interrupt, or peripheral function interrupt.
______
If wait mode is exited by a hardware reset or NMI interrupt, set the peripheral function interrupt priority
bits ILVL2 to ILVL0 to 0002 (interrupts disabled) before executing the WAIT instruction.
The CM02 bit affects the peripheral function interrupts. If the CM02 bit is 0 (peripheral function clocks
not turned off during wait mode), all peripheral function interrupts can be used to exit wait mode. If the
CM02 bit is 1 (peripheral function clock stops during wait mode), the peripheral functions using the
peripheral function clock stops operating, so that only the peripheral functions clocked by external signals can be used to exit wait mode.
Table 7.6 lists the interrupts to exit wait mode.
Table 7.6 Interrupts to Exit Wait Mode
Interrupt
NMI interrupt
Serial I/O interrupt
CM02 = 0
Multi-master I2C interrupt
Key input interrupt
A/D conversion interrupt
Timer A interrupt
Timer B interrupt
Timer S interrupt
_______
INT interrupt
CAN0 wake_up interrupt
Available
Available when internal and external
clocks are used
Available
Available
Available in one-shot or single sweep
mode
Available in all modes
Available in all modes
Available
Available in CAN sleep mode
CM02 = 1
Available
Available when external clock is used
Do not used
Available
Do not use
Available in event counter mode or when
count source is fC32
Do not use
Available
Available in CAN sleep mode
To use peripheral function interrupts to exit wait mode, set the followings before executing the WAIT
instruction.
1. Set the interrupt priority level to the bits ILVL2 to ILVL0 in the interrupt control register of the peripheral function interrupts that are used to exit wait mode. Also, set bits ILVL2 to ILVL0 of all peripheral
function interrupts that are not used to exit wait mode to 0002 (interrupt disabled).
2. Set the I flag to 1.
3. Operate the peripheral functions that are used to exit wait mode.
When the peripheral function interrupts are used to exit wait mode, an interrupt routine is executed
after an interrupt request is generated and the CPU is clocked.
The CPU clock used when exiting wait mode by a peripheral function interrupt is the same CPU clock
that is used when executing the WAIT instruction.
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7. Clock Generation Circuit
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7.6.3 Stop Mode
In stop mode, all oscillator circuits are turned off, so are the CPU clock and the peripheral function clocks.
Therefore, the CPU and the peripheral functions clocked by these clocks stop operating. The least amount of
power is consumed in this mode. If the voltage applied to Vcc pin is VRAM or more, the internal RAM is
retained. When applying 2.7 or less voltage to Vcc pin, make sure Vcc≥VRAM.
However, the peripheral functions clocked by external signals keep operating. The following interrupts can
be used to exit stop mode.
______
• NMI interrupt
• Key interrupt
______
• INT interrupt
• Timer A, Timer B interrupt (when counting external pulses in event counter mode)
• Serial I/O interrupt (when external clock is selected)
• Low voltage detection interrup (refer to "Low Voltage Detection Interrupt" for an operating
condition)
• CAN0 Wake_up interrupt (in CAN sleep mode)
7.6.3.1 Entering Stop Mode
The MCU is placed into stop mode by setting the CM10 bit in the CM1 register to 1 (all clocks turned off).
At the same time, the CM06 bit in the CM0 register is set to 1 (divide-by-8 mode) and the CM15 bit in the
CM10 register is set to 1 (main clock oscillator circuit drive capability high).
Before entering stop mode, set the CM20 bit to 0 (oscillation stop, re-oscillation detection function disable).
Also, if the CM11 bit is 1 (PLL clock for the CPU clock source), set the CM11 bit to 0 (main clock for the
CPU clock source) and the PLC07 bit to 0 (PLL turned off) before entering stop mode.
7.6.3.2 Pin Status during Stop Mode
The I/O pins retain their status held just prior to entering stop mode.
7.6.3.3 Exiting Stop Mode
______
The MCU is moved out of stop mode by a hardware reset, NMI interrupt or peripheral function interrupt.
______
If the MCU is to be moved out of stop mode by a hardware reset or NMI interrupt, set the peripheral
function interrupt priority bits ILVL2 to ILVL0 to 0002 (interrupts disable) before setting the CM10 bit to 1.
If the MCU is to be moved out of stop mode by a peripheral function interrupt, set up the following before
setting the CM10 bit to 1.
1. In bits ILVL2 to ILVL0 of the interrupt control register, set the interrupt priority level of the peripheral
function interrupt to be used to exit stop mode.
Also, for all of the peripheral function interrupts not used to exit stop mode, set bits ILVL2 to ILVL0 to
0002.
2. Set the I flag to 1.
3. Enable the peripheral function whose interrupt is to be used to exit stop mode.
In this case, when an interrupt request is generated and the CPU clock is thereby turned on, an
interrupt service routine is executed.
______
Which CPU clock will be used after exiting stop mode by a peripheral function or NMI interrupt is determined by the CPU clock that was on when the MCU was placed into stop mode as follows:
If the CPU clock before entering stop mode was derived from the sub clock: sub clock
If the CPU clock before entering stop mode was derived from the main clock: main clock divide-by-8
If the CPU clock before entering stop mode was derived from the on-chip oscillator clock: on-chip oscillator clock divide-by-8
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7. Clock Generation Circuit
M16C/29 Group
Figure 7.11 shows the state transition from normal operation mode to stop mode and wait mode. Figure
7.12 shows the state transition in normal operation mode.
Table 7.7 shows a state transition matrix describing allowed transition and setting. The vertical line
shows current state and horizontal line shows state after transition.
All oscillators stopped
Stop mode
Normal operation mode
CM10=1 (6)
WAIT
instruction
Medium-speed mode
(divided-by-8 mode)
Interrupt
Interrupt
Interrupt
CM07=0
CM06=1
CM05=0
CM11=0
CM10=1
Stop mode
WAIT
instruction
High-speed, mediumspeed mode
CM10=1 (6)
Interrupt
(5)
CPU operation stopped
Wait mode
Wait mode
(1, 2)
PLL operation
mode
WAIT
instruction
CM10=1 (6)
Stop mode
Low-speed mode
Interrupt
Interrupt
(7)
WAIT
instruction
CM10=1 (6)
Stop mode
Low power dissipation mode
Interrupt
CM21=1
CM21=0
CM10=1 (6)
Stop mode
Interrupt (4)
On-chip oscillator low power
dissipation mode
On-chip oscillator mode
(selectable frequency)
Stop mode
Wait mode
Interrupt
Wait mode
WAIT
instruction
Interrupt
CM10=1(6)
WAIT
instruction
Interrupt (4)
Interrupt
Wait mode
Wait mode
On-chip oscillator
mode (f 2(ROC)/16)
CM05, CM06, CM07: Bits in the CM0 register
CM10, CM11: Bits in the CM1 register
Reset
: Arrow shows mode can be changed. Do not change mode to another mode when no arrow is shown.
NOTES:
1. Do not go directly from PLL operation mode to wait or stop mode.
2. PLL operation mode can be entered from high speed mode. Similarly, PLL operation mode can be changed back to high speed mode.
3. When the PM21 bit is set to 0 (system clock protective function unused).
4. The on-chip oscillator clock divided by 8 provides the CPU clock.
5. Write to the CM0 register and CM1 register simultaneously by accessing in word units while CM21 bit is set to 0 (on-chip oscillator
turned off). When the clock generated externally is input to the XCIN pin, transit to stop mode with this process.
6. Before entering stop mode, be sure to clear the CM20 bit in the CM2 register to 0 (oscillation stop and oscillation restart detection
function disabled).
7. The CM06 bit is set to 1 (divide-by-8).
Figure 7.11 State Transition to Stop Mode and Wait Mode
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7. Clock Generation Circuit
M16C/29 Group
Main clock oscillation
On-chip oscillator clock
oscillation
PLL operation mode
PLC07=1
CM11=1
(5)
CPU clock: f(PLL)
CM07=0
CM06=0
CM17=0
PLC07=0
CM11=0
(5)
CM16=0
CM04=1
High-speed mode
CPU clock: f(XIN)
Middle-speed mode
(divide by 2)
CPU clock: f(XIN)/2
PLL operation
mode
CM07=0
CM07=0
CM06=0
CM06=0
CM06=0
CM17=0
CM17=0
CM17=1
CM16=0
CM16=1
CM16=0
CM16=0
Middle-speed mode Middle-speed mode
(divide by 8)
(divide by 16)
CPU clock: f(XIN)/8
CM07=0
CM06=1
CM04=1
PLC07=1
CM11=1
(5)
CM06=0
CM17=0
CPU clock: f(XIN)/4
CM07=0
CM04=0
CPU clock: f(PLL)
CM07=0
Middle-speed mode
(divide by 4)
PLC07=0
CM11=0
(5)
High-speed mode
CPU clock: f(XIN)
CM07=0
CPU clock
f(ROC)
f(ROC)/2
f(ROC)/4
f(ROC)/8
f(ROC)/16
CM06=0
CM17=1
CM16=1
CM21=1
CM04=0
Middle-speed mode
(divide by 2)
CPU clock: f(XIN)/2
CPU clock: f(XIN)/16
Middle-speed mode
(divide by 4)
CPU clock: f(XIN)/4
CM07=0
CM07=0
CM07=0
CM06=0
CM06=0
CM06=0
CM17=0
CM17=0
CM17=1
CM16=0
CM16=1
CM16=0
CPU clock: f(XIN)/8
CM07=1
(3)
CM07=0
CM06=1
CPU clock: f(XIN)/16
CM07=0
CM05=1
(1)
CM17=1
CM16=1
CPU clock
f(ROC)
f(ROC)/2
f(ROC)/4
f(ROC)/8
f(ROC)/16
CM21=1
CPU clock
f(ROC)
f(ROC)/2
f(ROC)/4
f(ROC)/8
f(ROC)/16
CM04=1
On-chip oscillator
low power
dissipation mode
CM05=0
M
M0
CPU clock
f(ROC)
f(ROC)/2
f(ROC)/4
f(ROC)/8
f(ROC)/16
CM05=1
(1)
CM07=0
(4)
CM07=1
(3)
CM21=0
CM04=0
On-chip oscillator
mode
CM21=0
(2, 6)
CM06=0
CM07=0
(2, 4)
Low-speed mode
CM05=0
CM04=1
Middle-speed mode Middle-speed mode
(divide by 8)
(divide by 16)
On-chip oscillator low power
dissipation mode
On-chip oscillator mode
CM21=0
(2, 6)
Low-speed
mode
CPU clock: f(XCIN)
CPU clock: f(XCIN)
CM07=0
CM07=0
CM21=1
CM05=1
(1, 7)
CM05=0
Low power dissipation mode
CPU clock: f(XCIN)
CM07=0
CM06=1
CM15=1
Sub clock oscillation
: Arrow shows mode can be changed. Do not change mode to another mode when no arrow is shown.
NOTES:
1. Avoid making a transition when the CM20 bit is set to 1 (oscillation stop, re-oscillation detection function enabled).
Set the CM20 bit to 0 (oscillation stop, re-oscillation detection function disabled) before transiting.
2. Wait for the main clock oscillation stabilization time before switching over. Set the CM15 bit in the CM1 register to 1 (drive capacity High) until main clock oscillation is stabilized.
3. Switch clock after oscillation of sub-clock is sufficiently stable.
4. Change bits CM17 and CM16 before changing the CM06 bit.
5. The PM20 bit in the PM2 register becomes effective when the PLC07 bit in the PLC0 register is set to 1 (PLL on). Change the PM20 bit when the PLC07 bit is set to 0 (PLL off).
Set the PM20 bit to 0 (2 waits) when PLL clock > 16MHz.
6. Set the CM06 bit to 1 (division by 8 mode) before changing back the operation mode from on-chip oscillator mode to high- or middle-speed mode.
7. When the CM21 bit is set to 0 (on-chip oscillator turned off) and the CM05 bit is set to 1 (main clock turned off), the CM06 bit is fixed to 1 (divide-by-8 mode) and the
CM15 bit is fixed to 1 (drive capability High).
Figure 7.12 State Transition in Normal Mode
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CM04=0
7. Clock Generation Circuit
M16C/29 Group
Table 7.7 Allowed Transition and Setting
State after transition
High-speed mode, Low-speed mode2 Low power
middle-speed mode
dissipation mode
High-speed mode,
middle-speed mode
8
Current state
Low-speed mode2
(9)7
Low power dissipation
mode
(11)1, 6
--
PLL operation mode2
On-chip oscillator mode
On-chip oscillator
low power
dissipation mode
(15)
--
(16)1
(17)
--
(8)
--
(16)1
(17)
--
--
--
(16)1
(17)
--
--
(13)3
--
(8)
On-chip oscillator
mode
PLL operation
mode2
(10)
--
--
(14)4
(9)7
--
--
8
(11)1
(16)1
(17)
--
--
--
(10)
8
(16)1
(17)
--
Stop mode
(18)5
(18)
(18)
--
(18)5
(18)5
Wait mode
(18)
(18)
(18)
--
(18)
(18)
NOTES:
1. Avoid making a transition when the CM20 bit is set to 1 (oscillation stop, re-oscillation detection function enabled).
Set the CM20 bit to 0 (oscillation stop, re-oscillation detection function disabled) before transiting.
2. On-chip oscillator clock oscillates and stops in low-speed mode. In this mode, the on-chip oscillator can be used as peripheral function clock.
Sub clock oscillates and stops in PLL operation mode. In this mode, sub clock can be used as a clock for the timers A and B.
3. PLL operation mode can only be entered from and changed to high-speed mode.
4. Set the CM06 bit to 1 (division by 8 mode) before transiting from on-chip oscillator mode to high- or middle-speed mode.
5. When exiting stop mode, the CM06 bit is set to 1 (division by 8 mode).
6. If the CM05 bit is set to 1 (main clock stop), then the CM06 bit is set to 1 (division by 8 mode).
7. A transition can be made only when sub clock is oscillating.
8. State transitions within the same mode (divide-by-n values changed or subclock oscillation turned on or off) are shown in the table below.
Sub clock oscillating
Divided
by 2
Sub clock
turned off
Sub clock
oscillating
No division
(4)
Divided
by 4
Divided
by 8
(5)
(7)
(5)
Sub clock turned off
No
division
(1)
--
--
--
(7)
(6)
--
(1)
--
--
--
(7)
(6)
--
--
(1)
--
--
(6)
--
--
--
(1)
--
--
--
--
--
(1)
(4)
(5)
(7)
(6)
(5)
(7)
(6)
(7)
(6)
(6)
Divided by 4
(3)
(4)
Divided by 8
(3)
(4)
(5)
Divided by 16
(3)
(4)
(5)
(7)
No division
(2)
--
--
--
--
Divided by 2
--
(2)
--
--
--
(3)
Divided by 4
--
--
(2)
--
--
(3)
(4)
Divided by 8
--
--
--
(2)
--
(3)
(4)
(5)
Divided by 16
--
--
--
--
(2)
(3)
(4)
(5)
(2)
CM04 = 1
Sub clock oscillating
(3)
CM06 = 0,
CM17 = 0 , CM16 = 0
CM06 = 0,
CM17 = 0 , CM16 = 1
CM06 = 0,
CM17 = 1 , CM16 = 0
CM06 = 0,
CM17 = 1 , CM16 = 1
CPU clock no division mode
CPU clock division by 2 mode
CPU clock division by 4 mode
CPU clock division by 16 mode
(7)
CM06 = 1
CPU clock division by 8 mode
(8)
CM07 = 0
Main clock, PLL clock,
or on-chip oscillator clock selected
(9)
CM07 = 1
Sub clock selected
(10)
CM05 = 0
Main clock oscillating
(11)
CM05 = 1
(12)
PLC07 = 0,
CM11 = 0
PLC07 = 1,
CM11 = 1
(13)
Divided Divided
by 8
by 16
(6)
(7)
--: Cannot transit
Operation
Sub clock turned off
(6)
--
(3)
CM04 = 0
(5)
Divided
by 4
Divided by 2
Setting
(4)
Divided
by 2
Divided
by 16
9. ( ) : setting method. Refer to following table.
(1)
Main clock turned off
Main clock selected
PLL clock selected
(14)
CM21 = 0
(15)
CM21 = 1
On-chip oscillator clock selected
(16)
CM10 = 1
Transition to stop mode
(17)
wait instruction
Transition to wait mode
(18)
Hardware interrupt
Main clock or PLL clock selected
Exit stop mode or wait mode
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
Wait mode
(12)3
On-chip oscillator
low power dissipation
mode
No
division
Stop mode
page 65 of 458
CM04, CM05, CM06, CM07
CM10, CM11, CM16, CM17
CM20, CM21
PLC07
: Bits in the CM0 register
: Bits in the CM1 register
: Bits in the CM2 register
: Bit in the PLC0 register
--
--
----: Cannot transit
7. Clock Generation Circuit
M16C/29 Group
7.7 System Clock Protective Function
When the main clock is selected for the CPU clock source, this function protects the clock from modifications in order to prevent the CPU clock from becoming halted by run-away.
If the PM21 bit in the PM2 register is set to 1 (clock modification disabled), the following bits are protected
against writes:
• Bits CM02, CM05, and CM07 in CM0 register
• Bits CM10 and CM11 in CM1 register
• CM20 bit in CM2 register
• All bits in the PLC0 register
Before the system clock protective function can be used, the following register settings must be made while
the CM05 bit in the CM0 register is 0 (main clock oscillating) and CM07 bit is 0 (main clock selected for the
CPU clock source):
(1) Set the PRC1 bit in the PRCR register to 1 (enable writes to PM2 register).
(2) Set the PM21 bit in the PM2 register to 1 (disable clock modification).
(3) Set the PRC1 bit in the PRCR register to 0 (disable writes to PM2 register).
Do not execute the WAIT instruction when the PM21 bit is 1.
7.8 Oscillation Stop and Re-oscillation Detect Function
The oscillation stop and re-oscillation detect function detects the re-oscillation after stop of main clock
oscillation circuit. When the oscillation stop and re-oscillation detection occurs, the oscillation stop detect
function is reset or oscillation stop and re-oscillation detection interrupt is generated, depending on the
CM27 bit set in the CM2 register. The oscillation stop detect function is enabled or disabled by the CM20 bit
in the CM2 register. Table 7.8 lists a specification overview of the oscillation stop and re-oscillation detect
function.
Table 7.8 Specification Overview of Oscillation Stop and Re-oscillation Detect Function
Item
Specification
Oscillation stop detectable clock and
f(XIN) ≥ 2 MHz
frequency bandwidth
Enabling condition for oscillation stop, Set CM20 bit to 1(enable)
re-oscillation detection function
Operation at oscillation stop,
•Reset occurs (when CM27 bit =0)
re-oscillation detection
•Oscillation stop, re-oscillation detection interrupt occurs(when CM27 bit =1)
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7. Clock Generation Circuit
M16C/29 Group
7.8.1 Operation When CM27 bit = 0 (Oscillation Stop Detection Reset)
When main clock stop is detected when the CM20 bit is 1 (oscillation stop, re-oscillation detection function enabled), the MCU is initialized, coming to a halt (oscillation stop reset; refer to “SFR”, “Reset”).
This status is reset with hardware reset 1. Also, even when re-oscillation is detected, the MCU can be
initialized and stopped; it is, however, necessary to avoid such usage. (During main clock stop, do not set
the CM20 bit to 1 and the CM27 bit to 0.)
7.8.2 Operation When CM27 bit = 1 (Oscillation Stop and Re-oscillation Detect Interrupt)
When the main clock corresponds to the CPU clock source and the CM20 bit is 1 (oscillation stop and reoscillation detect function enabled), the system is placed in the following state if the main clock comes to
a halt:
• Oscillation stop and re-oscillation detect interrupt request occurs.
• The on-chip oscillator starts oscillation, and the on-chip oscillator clock becomes the CPU clock and
clock
source for peripheral functions in place of the main clock.
• CM21 bit = 1 (on-chip oscillator clock for CPU clock source)
• CM22 bit = 1 (main clock stop detected)
• CM23 bit = 1 (main clock stopped)
When the PLL clock corresponds to the CPU clock source and the CM20 bit is 1, the system is placed in
the following state if the main clock comes to a halt: Since the CM21 bit remains unchanged, set it to 1
(on-chip oscillator clock) inside the interrupt routine.
• Oscillation stop and re-oscillation detect interrupt request occurs.
• CM22 bit = 1 (main clock stop detected)
• CM23 bit = 1 (main clock stopped)
• CM21 bit remains unchanged
When the CM20 bit is 1, the system is placed in the following state if the main clock re-oscillates from the
stop condition:
• Oscillation stop and re-oscillation detect interrupt request occurs.
• CM22 bit = 1 (main clock re-oscillation detected)
• CM23 bit = 0 (main clock oscillation)
• CM21 bit remains unchanged
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7. Clock Generation Circuit
M16C/29 Group
7.8.3 How to Use Oscillation Stop and Re-oscillation Detect Function
• The oscillation stop and re-oscillation detect interrupt shares the vector with the watchdog timer interrupt. If the oscillation stop, re-oscillation detection and watchdog timer interrupts both are used, read
the CM22 bit in an interrupt routine to determine which interrupt source is requesting the interrupt.
• Where the main clock re-oscillated after oscillation stop, return the main clock to the CPU clock and
peripheral function clock source by program. Figure 7.13 shows the procedure for switching the clock
source from the on-chip oscillator to the main clock.
• Simultaneously with oscillation stop, re-oscillation detection interrupt occurrence, the CM22 bit becomes 1. When the CM22 bit is set at 1, oscillation stop, re-oscillation detection interrupt are disabled.
By setting the CM22 bit to 0 by program, oscillation stop, re-oscillation detection interrupt are enabled.
• If the main clock stops during low speed mode where the CM20 bit is 1, an oscillation stop, re-oscillation
detection interrupt request is generated. At the same time, the on-chip oscillator starts oscillating. In
this case, although the CPU clock is derived from the sub clock as it was before the interrupt occurred,
the peripheral function clocks now are derived from the on-chip oscillator clock.
• To enter wait mode while using the oscillation stop, re-oscillation detection function, set the CM02 bit to
0 (peripheral function clocks not turned off during wait mode).
• Since the oscillation stop, re-oscillation detection function is provided in preparation for main clock stop
due to external factors, set the CM20 bit to 0 (Oscillation stop, re-oscillation detection function disabled)
where the main clock is stopped or oscillated by program, that is where the stop mode is selected or the
CM05 bit is altered.
• This function cannot be used if the main clock frequency is 2 MHz or less. In that case, set the CM20 bit
to 0.
Switch to the main clock
Determine several times whether
the CM23 bit is set to 0
(main clock oscillates)
No
Yes
Set the CM06 bit to 1
(divide-by-8 mode)
Set the CM22 bit to 0
("oscillatin stop, re-oscillation" not detected)
Set the CM21 bit to 0
(main clock or PLL clock)
End
CM06: Bit in the CM0 register
CM23 to CM21: Bits in the CM2 register
NOTE:
1. If the clock source for CPU clock is to be changed to PLL clock, set to PLL operation
mode after set to high-speed mode.
Figure 7.13 Procedure to Switch Clock Source From On-chip Oscillator to Main Clock
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8. Protection
M16C/29 Group
8. Protection
In the event that a program runs out of control, this function protects the important registers so that they will
not be rewritten easily. Figure 8.1 shows the PRCR register. The following lists the registers protected by
the PRCR register.
• Registers protected by the PRC0 bit: CM0, CM1, CM2, PLC0, ROCR, PCLKR, and CCLKR
• Registers protected by the PRC1 bit: PM0, PM1, PM2, TB2SC, INVC0, and INVC1
• Registers protected by the PRC2 bit: PD9 , PACR, S4C, and NDDR
• Registers protected by the PRC3 bit: VCR2 and D4INT
The PRC2 bit is set to 0 (write enabled) when data is written to the SFR area after setting the PRC2 bit to 1
(write enable). Set registers PD9, PACR, S4C and NDDR immediately after setting the PRC2 bit in the
PRCR register to 1 (write enable). Do not generate an interrupt or a DMA transfer between the instruction
to set the PRC2 bit to 1 and the following instruction. Bits PRC3, PRC1, and PRC0 are not set to 0 even if
data is written to the SFR area. Set bits PRC3, PRC1, and PRC0 to 0 by program.
Protect Register
b7
b6
b5
b4
0 0
b3
b2
b1
b0
Symbol
PRCR
Address
000A16
Bit Symbol
Bit Name
PRC0
PRC1
Protect bit 0
Protect bit 1
After Reset
XX0000002
Function
Enable write to register CM0, CM1,
CM2, ROCR, PLC0, PCLKR, and
CCLKR
0: Write protected
1: Write enabled
Enable write to registers PM0, PM1,
PM2, TB2SC, INVC0, and INVC1
0: Write protected
1: Write enabled
PRC2
Protect bit 2
Enable write to registers PD9,
PACR, S4C, and NDDR
0: Write protected
1: Write enabled(1)
PRC3
(b5-b4)
(b7-b6)
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RW
RW
RW
Protect bit 3
Enable write to registers VCR2 and
D4INT
0: Write protected
1: Write enabled
RW
Reserved bit
Set to 0
RW
Nothing is assigned. If necessary, set to 0.
When read, its content is undefined
NOTE:
1. The PRC2 bit is set to 0 when writing into the SFR area after the PRC2 bit is set to 1. Bits
PRC0, PRC1, and PRC3 are not automatically set to 0. Set them to 0 by program.
Figure 8.1 PRCR Register
RW
9. Interrupts
M16C/29 Group
9. Interrupts
Note
The SI/O4 interrupt of peripheral function interrupts is not available in the 64-pin package.
The low voltage detection function is not available in M16C/29 T-ver. and V-ver..
9.1 Type of Interrupts
Figure 9.1 shows types of interrupts.

















Hardware
Special
(Non-maskable interrupt)
















Interrupt
Software
(Non-maskable interrupt)
Undefined instruction (UND instruction)
Overflow (INTO instruction)
BRK instruction
INT instruction
_______
NMI
DBC (2)
Watchdog timer
Oscillation stop and re-oscillation
detection
Low voltage detection
Single step (2)
Address match
________
Peripheral function (1)
(Maskable interrupt)
NOTES:
1. Peripheral function interrupts are generated by the MCU's internal functions.
2. Do not normally use this interrupt because it is provided exclusively for use by development
tools.
Figure 9.1 Interrupts
• Maskable Interrupt: An interrupt which can be enabled (disabled) by the interrupt enable flag (I flag) or
whose interrupt priority can be changed by priority level.
• Non-maskable Interrupt: An interrupt which cannot be enabled (disabled) by the interrupt enable flag
(I flag) or whose interrupt priority cannot be changed by priority level.
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9. Interrupts
M16C/29 Group
9.1.1 Software Interrupts
A software interrupt occurs when executing certain instructions. Software interrupts are non-maskable
interrupts.
9.1.1.1 Undefined Instruction Interrupt
An undefined instruction interrupt occurs when executing the UND instruction.
9.1.1.2 Overflow Interrupt
An overflow interrupt occurs when executing the INTO instruction with the O flag set to 1 (the operation resulted in an overflow). The following are instructions whose O flag changes by arithmetic: ABS,
ADC, ADCF, ADD, CMP, DIV, DIVU, DIVX, NEG, RMPA, SBB, SHA, SUB
9.1.1.3 BRK Interrupt
A BRK interrupt occurs when executing the BRK instruction.
9.1.1.4 INT Instruction Interrupt
An INT instruction interrupt occurs when executing the INT instruction. Software interrupt Nos. 0 to 63
can be specified for the INT instruction. Because software interrupt Nos. 1 to 31 are assigned to
peripheral function interrupts, the same interrupt routine as for peripheral function interrupts can be
executed by executing the INT instruction.
In software interrupt Nos. 0 to 31, the U flag is saved to the stack during instruction execution and is
cleared to 0 (ISP selected) before executing an interrupt sequence. The U flag is restored from the
stack when returning from the interrupt routine. In software interrupt Nos. 32 to 63, the U flag does not
change state during instruction execution, and the SP then selected is used.
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9. Interrupts
M16C/29 Group
9.1.2 Hardware Interrupts
Hardware interrupts are classified into two types — special interrupts and peripheral function interrupts.
9.1.2.1 Special Interrupts
Special interrupts are non-maskable interrupts.
_______
9.1.2.1.1 NMI Interrupt
_______
_______
An NMI interrupt is generated when input on the NMI pin changes state from high to low. For details
_______
about the NMI interrupt, refer to the section "NMI interrupt".
________
9.1.2.1.2 DBC Interrupt
This interrupt is exclusively for debugger, do not use in any other circumstances.
9.1.2.1.3 Watchdog Timer Interrupt
Generated by the watchdog timer. Once a watchdog timer interrupt is generated, be sure to initialize
the watchdog timer. For details about the watchdog timer, refer to the section "watchdog timer".
9.1.2.1.4 Oscillation Stop and Re-oscillation Detection Interrupt
Generated by the oscillation stop and re-oscillation detection function. For details about the oscillation stop and re-oscillation detection function, refer to the section "clock generating circuit".
9.1.2.1.5 Low Voltage Detection Interrupt
Generated by the voltage detection circuit. For details about the voltage detection circuit, refer to the
section "voltage detection circuit".
9.1.2.1.6 Single-step Interrupt
Do not normally use this interrupt because it is provided exclusively for use by development tools.
9.1.2.1.7 Address Match Interrupt
An address match interrupt is generated immediately before executing the instruction at the address
indicated by the RMAD0 or RMAD1 register, if the corresponding enable bit (AIER0 or AIER1 bit in
the AIER register) is set to 1. For details about the address match interrupt, refer to the section
“address match interrupt”.
9.1.2.2 Peripheral Function Interrupts
Peripheral function interrupts are maskable interrupts and generated by the MCU's internal functions.
The interrupt sources for peripheral function interrupts are listed in Table 9.2 Relocatable Vector
Tables. For details about the peripheral functions, refer to the description of each peripheral function
in this manual.
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9. Interrupts
M16C/29 Group
9.2 Interrupts and Interrupt Vector
One interrupt vector consists of 4 bytes. Set the start address of each interrupt routine in the respective
interrupt vectors. When an interrupt request is accepted, the CPU branches to the address set in the
corresponding interrupt vector. Figure 9.2 shows the interrupt vector.
MSB
Vector address (L)
LSB
Low address
Mid address
Vector address (H)
0000
High address
0000
0000
Figure 9.2 Interrupt Vector
9.2.1 Fixed Vector Tables
The fixed vector tables are allocated to the addresses from FFFDC16 to FFFFF16. Table 9.1 lists the
fixed vector tables. In the flash memory version of MCU, the vector addresses (H) of fixed vectors are
used by the ID code check function. For details, refer to the section "flash memory rewrite disabling
function".
Table 9.1 Fixed Vector Tables
Interrupt source
Vector table addresses
Remarks
Address (L) to address (H)
Undefined instruction FFFDC16 to FFFDF16
Interrupt on UND instruction
Overflow
FFFE016 to FFFE316
Interrupt on INTO instruction
If
the contents of address
BRK instruction
FFFE416 to FFFE716
FFFE716 is FF16, program execution starts from the address
shown by the vector in the
relocatable vector table
Address match
FFFE816 to FFFEB16
Single step (1)
FFFEC16 to FFFEF16
Watchdog timer
FFFF016 to FFFF316
Oscillation stop and
re-oscillation detection,
low voltage detection
________
DBC (1)
FFFF416 to FFFF716
_______
NMI
FFFF816 to FFFFB16
Reset(2)
FFFFC16 to FFFFF16
Reference
M16C/60, M16C/20
serise software
maual
Address match interrupt
Watchdog timer,
clock generating circuit,
voltage detection circuit
_______
NMI interrupt
Reset
NOTE:
1. Do not normally use this interrupt because it is provided exclusively for use by development tools.
Rev. 1.12 Mar.30, 2007
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9. Interrupts
M16C/29 Group
9.2.2 Relocatable Vector Tables
The 256 bytes beginning with the start address set in the INTB register comprise a reloacatable vector
table area. Table 9.2 lists the relocatable vector tables. Setting an even address in the INTB register
results in the interrupt sequence being executed faster than in the case of odd addresses.
Table 9.2 Relocatable Vector Tables
Vector address (1)
Address (L) to address (H)
Interrupt source
BRK instruction (2)
+0 to +3 (0000 16 to 0003 16)
Software interrupt
number
0
+4 to +7 (0004 16 to 0007 16)
1
CAN0 receive completion
+8 to +11 (0008 16 to 000B 16)
2
CAN0 wakeup (3)
CAN0 transmit completion
+12 to +15 (000C 16 to 000F 16 )
3
INT3
+16 to +19 (0010 16 to 0013 16)
4
IC/OC interrupt 0
+20 to +23 (0014 16 to 0017 16)
5
Reference
M16C/60, M16C/20
series software
manual
CAN module
INT interrupt
Timer S
Timer S
Multi-Master I 2C bus
interface
+24 to +27 (0018 16 to 001B 16)
6
IC/OC base timer, S CL/SDA(4)
+28 to +31 (001C 16 to 001F 16 )
7
SI/O4, INT5 (5)
+32 to +35 (0020 16 to 0023 16)
8
INT4 (5)
+36 to +39 (0024 16 to 0027 16)
9
INT interrupt
Serial I/O
Serial I/O
IC/OC interrupt 1,
SI/O3,
I 2C
bus
interface (4)
UART 2 bus collision detection (6)
+40 to +43 (0028 16 to 002B 16)
10
DMA0
+44 to +47 (002C 16 to 002F 16 )
11
DMA1
+48 to +51 (0030 16 to 0033 16)
12
CAN0 state, error
+52 to +55 (0034 16 to 0037 16)
13
CAN module
+56 to +59 (0038 16 to 003B 16)
14
A/D convertor,
Key input interrupt
+60 to +63 (003C 16 to 003F 16 )
15
+64 to +67 (0040 16 to 0043 16)
16
UART0 transmit
+68 to +71 (0044 16 to 0047 16)
17
UART0 receive
+72 to +75 (0048 16 to 004B 16)
18
UART1 transmit
+76 to +79 (004C 16 to 004F 16 )
19
UART1 receive
+80 to +83 (0050 16 to 0053 16)
20
Timer A0
+84 to +87 (0054 16 to 0057 16)
21
Timer A1
+88 to +91 (0058 16 to 005B 16)
22
Timer A2
+92 to +95 (005C 16 to 005F 16 )
23
Timer A3
+96 to +99 (0060 16 to 0063 16)
24
Timer A4
+100 to +103 (0064 16 to 0067 16)
25
Timer B0
+104 to +107 (0068 16 to 006B 16)
26
Timer B1
+108 to +111 (006C 16 to 006F 16)
27
Timer B2
+112 to +115 (0070 16 to 0073 16)
28
INT0
+116 to +119 (0074 16 to 0077 16)
29
INT1
+120 to +123 (0078 16 to 007B 16)
30
INT2
+124 to +127 (007C 16 to 007F 16)
31
Software interrupt (2)
+128 to +131 (0080 16 to 0083 16)
to
+252 to +255 (00FC 16 to 00FF 16)
32
to
A/D, Key input interrupt (7)
UART2 transmit,
NACK2 (8)
UART2 receive, ACK2 (8)
63
DMAC
Serial I/O
Timer
INT interrupt
M16C/60, M16C/20
series software
manual
NOTES:
1. Address relative to address in INTB.
2. These interrupts cannot be disabled using the I flag.
3. Set the IFSR22 bit in the IFSR register to 0.
4. Use bits IFSR26 and IFSR27 in the IFSR2A register to select.
5. Use bits IFSR6 and IFSR7 in the IFSR register to select.
6. Bus collision detection: In IEBus mode, this bus collision detection constitutes the cause of an interrupt. In I2C bus
mode, however, a start condition or a stop condition detection constitutes the cause of an interrupt.
7. Use the IFSR21 bit in the IFSR2A register to select.
8. During I2C bus mode, NACK and ACK interrupts comprise the interrupt source.
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9. Interrupts
M16C/29 Group
9.3 Interrupt Control
The following describes how to enable/disable the maskable interrupts, and how to set the priority in which
order they are accepted. What is explained here does not apply to nonmaskable interrupts.
Use I flag in the the FLG register, IPL, and bits ILVL2 to ILVL0 in the each interrupt control register to
enable/disable the maskable interrupts. Whether an interrupt is requested is indicated by the IR bit in each
interrupt control register.
Figure 9.3 shows the interrupt control registers.
Also, the following interrupts share a vector and an interrupt control register.
________
•INT4 and SIO3
________
•INT5 and SIO4
•A/D converter and key input interrupt
•IC/OC base timer and SCL/SDA
•IC/OC interrupt 1 and I2C bus interface
An interrupt request is set by bits IFSR6 and IFSR7 in the IFSR register and bits IFSR27, IFSR26, and
IFSR21 in the IFSR2A register. Figure 9.4 shows registers IFSR register and IFSR2A.
Rev. 1.12 Mar.30, 2007
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9. Interrupts
M16C/29 Group
Interrupt Control Register(2)
b
b4
b3
b2
b1
b0
Symbol
C01WKIC
C0RECIC
C0TRMIC
ICOC0IC
ICOC1IC, IICIC(3)
BTIC, SCLDAIC(3)
BCNIC
DM0IC, DM1IC
C01ERRIC
ADIC, KUPIC(3)
S0TIC to S2TIC
S0RIC to S2RIC
TA0IC to TA4IC
TB0IC to TB2IC
Bit Symbol
ILVL0
Bit Name
Interrupt priority level
select bit
ILVL1
ILVL2
IR
(b7-b4)
Address
004116
004216
004316
004516
004616
004716
004A16
004B16, 004C16
004D16
004E16
005116, 005316, 004F16
005216, 005416, 005016
005516 to 005916
005A16 to 005C16
Interrupt request bit
After reset
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
XXXXX0002
Function
b2 b1 b0
000:
001:
010:
011:
100:
101:
110:
111:
Level 0 (interrupt disabled)
Level 1
Level 2
Level 3
Level 4
Level 5
Level 6
Level 7
0: Interrupt not requested
1: Interrupt requested
RW
RW
RW
RW
RW(1)
Nothing is assigned. If necessary, set to 0.
When read, the contents are undefined
NOTES:
1. This bit can only be reset by writing 0 (Do not write 1).
2. To rewrite the interrupt control registers, do so at a point that does not generate the interrupt request for that register.
For details, refer to 22. 4 Interrupts.
3. Use the IFSR2A register to select.
Symbol
Address
After reset
INT3IC
004416
XX00X0002
b
b4 b3 b2 b1 b0
S4IC, INT5IC
004816
XX00X0002
S3IC, INT4IC
004916
XX00X0002
0
INT0IC to INT2IC
005D16 to 005F16
XX00X0002
Bit Symbol
ILVL0
Bit Name
Interrupt priority level
select bit
ILVL1
ILVL2
IR
POL
(b5)
(b7-b6)
Function
b2 b1 b0
0 0 0 : Level 0 (interrupt disabled)
0 0 1 : Level 1
0 1 0 : Level 2
0 1 1 : Level 3
1 0 0 : Level 4
1 0 1 : Level 5
1 1 0 : Level 6
1 1 1 : Level 7
RW
RW
RW
RW
Interrupt request bit
0: Interrupt not requested
1: Interrupt requested
Polarity select bit
0: Selects falling edge (3, 4)
1: Selects rising edge
RW
Reserved bit
Set to 0
RW
RW(1)
Nothing is assigned. If necessary, set to 0.
When read, the contents are undefined
NOTES:
1. This bit can only be reset by writing 0 (Do not write 1).
2. To rewrite the interrupt control register, do so at a point that does not generate the interrupt request for that
register. For details, refer to 22.4 Interrupts.
3. If the IFSRi bit in the IFSR register (i = 0 to 5) is 1 (both edges), set the POL bit in the INTiIC register to 0
(falling edge).
4. Set the POL bit in register S3IC or S4IC to 0 (falling edge) when the IFSR6 bit in the IFSR register is set to 0
(SI/O3 selected) or IFSR7 bit in the IFSR register to 0 (SI/O4 selected), respectively.
Figure 9.3 Interrupt Control Registers
C01WKIC, 0RECI ,C0TRMIC, OC0I ,CO 1IC, IC,BTIC,S LDAIC,B NIC,DM0IC,DM1IC, 01ER IC,ADIC,KUPIC,S0TICtoS2TIC,S0RICtoS2RIC,TA0ICtoTA4IC,TB0ICtoTB2IC,NT3IC,S4IC,NT5IC,S31C,INT4IC,NT0ICtoINT2ICRegister
Rev. 1.12 Mar.30, 2007
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9. Interrupts
M16C/29 Group
Interrupt Request Cause Select Register
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
IFSR
Address
035F16
Bit Symbol
After Reset
0016
Bit Name
Function
RW
IFSR0
INT0 interrupt polarity
switching bit
0 : One edge
1 : Both edges
(1)
RW
IFSR1
INT1 interrupt polarity
switching bit
0 : One edge
1 : Both edges
(1)
RW
IFSR2
INT2 interrupt polarity
switching bit
0 : One edge
1 : Both edges
(1)
RW
IFSR3
INT3 interrupt polarity
switching bit
0 : One edge
1 : Both edges
(1)
RW
IFSR4
INT4 interrupt polarity
switching bit
0 : One edge
1 : Both edges
(1)
RW
IFSR5
INT5 interrupt polarity
switching bit
0 : One edge
1 : Both edges
(1)
RW
IFSR6
Interrupt request cause
select bit
0 : SI/O3
1 : INT4
IFSR7
Interrupt request cause
select bit
0 : SI/O4
1 : INT5
(2)
RW
(2)
RW
NOTES:
1. When setting this bit to 1 (both edges), make sure the POL bit in registers INT0IC to INT5IC is set to
0 (falling edge).
2. When setting this bit to 0 (SI/O3, SI/O4), make sure the POL bit in registers S3IC and S4IC is set to
0 (falling edge).
Interrupt Request Cause Select Register 2
b7
b6
b5
b4
b3
b2
b1
b0
0
Symbol
IFSR2A
Address
035E 16
Bit Symbol
Bit Name
Function
RW
IFSR20
Reserved bit
Set to 0
RW
IFSR21
Interrupt request cause
select bit
0: A/D conversion
1: Key input
RW
IFSR22
Interrupt request cause
select bit
0: CAN0 wakeup/error
1: Do not set
RW
(b5-b3)
Nothing is assigned. If necessary, set to 0.
When read, the contents are undefined
IFSR26
Interrupt request cause
select bit
0: IC/OC base timer
1: SCL/SDA
RW
IFSR27
Interrupt request cause
select bit
0: IC/OC interrupt 1
1: I2C bus interface
RW
Figure 9.4 IFSR Register and IFSR2A Register
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
After reset
00XXX000 2
page 77 of 458
9. Interrupts
M16C/29 Group
9.3.1 I Flag
The I flag enables or disables the maskable interrupt. Setting the I flag to 1 (= enabled) enables the
maskable interrupt. Setting the I flag to 0 (= disabled) disables all maskable interrupts.
9.3.2 IR Bit
The IR bit is set to 1 (= interrupt requested) when an interrupt request is generated. Then, when the
interrupt request is accepted and the CPU branches to the corresponding interrupt vector, the IR bit is
cleared to 0 (= interrupt not requested).
The IR bit can be cleared to 0 in a program. Note that do not write 1 to this bit.
9.3.3 ILVL2 to ILVL0 Bits and IPL
Interrupt priority levels can be set using bits ILVL2 to ILVL0.
Table 9.3 shows the settings of interrupt priority levels and Table 9.4 shows the interrupt priority levels
enabled by the IPL.
The following are conditions under which an interrupt is accepted:
· I flag = 1
· IR bit = 1
· interrupt priority level > IPL
The I flag, IR bit, bits ILVL2 to ILVL0, and IPL are independent of each other. In no case do they affect
one another.
Table 9.4 Interrupt Priority Levels
Enabled by IPL
Table 9.3 Settings of Interrupt Priority
Levels
ILVL2 to ILVL0 bits
Interrupt priority
level
0002
Level 0 (interrupt disabled)
0012
Level 1
0102
Priority
order
IPL
Enabled interrupt priority levels
0002
Interrupt levels 1 and above are enabled
0012
Interrupt levels 2 and above are enabled
Level 2
0102
Interrupt levels 3 and above are enabled
0112
Level 3
0112
Interrupt levels 4 and above are enabled
1002
Level 4
1002
Interrupt levels 5 and above are enabled
1012
Level 5
1012
Interrupt levels 6 and above are enabled
1102
Level 6
1102
Interrupt levels 7 and above are enabled
1112
All maskable interrupts are disabled
1112
Low
High
Level 7
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9. Interrupts
M16C/29 Group
9.4 Interrupt Sequence
An interrupt sequence (the device behavior from the instant an interrupt is accepted to the instant the
interrupt routine is executed) is described here.
If an interrupt occurs during execution of an instruction, the processor determines its priority when the
execution of the instruction is completed, and transfers control to the interrupt sequence from the next
cycle. If an interrupt occurs during execution of either the SMOVB, SMOVF, SSTR or RMPA instruction,
the processor temporarily suspends the instruction being executed, and transfers control to the interrupt
sequence.
The CPU behavior during the interrupt sequence is described below. Figure 9.5 shows time required for
executing the interrupt sequence.
(1) The CPU gets interrupt information (interrupt number and interrupt request priority level) by reading
the address 0000016. Then it clears the IR bit for the corresponding interrupt to 0 (interrupt not
requested).
(2) The FLG register immediately before entering the interrupt sequence is saved to the CPU’s internal
temporary register(Note).
(3) The I, D and U flags in the FLG register become as follows:
The I flag is cleared to 0 (interrupts disabled).
The D flag is cleared to 0 (single-step interrupt disabled).
The U flag is cleared to 0 (ISP selected).
However, the U flag does not change state if an INT instruction for software interrupt Nos. 32 to 63 is
executed.
(4) The CPU’s internal temporary register(1) is saved to the stack.
(5) The PC is saved to the stack.
(6) The interrupt priority level of the accepted interrupt is set in the IPL.
(7) The start address of the relevant interrupt routine set in the interrupt vector is stored in the PC.
After the interrupt sequence is completed, the processor resumes executing instructions from the start
address of the interrupt routine.
NOTE:
1. This register cannot be used by user.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
CPU clock
Address bus
Data bus
Address
000016
Interrupt
information
RD
Undefined(1)
Undefined(1)
SP-2
SP-2
contents
SP-4
SP-4
contents
vec
vec
contents
vec+2
PC
vec+2
contents
Undefined(1)
WR(2)
NOTES:
1. The undefined state depends on the instruction queue buffer. A read cycle occurs when the instruction queue
buffer is ready to accept instructions.
2. When the stack is in the internal RAM, the WR signal indicates the write timing by changing high-level to low-level.
Figure 9.5 Time Required for Executing Interrupt Sequence
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
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9. Interrupts
M16C/29 Group
9.4.1 Interrupt Response Time
Figure 9.6 shows the interrupt response time. The interrupt response or interrupt acknowledge time
denotes time from when an interrupt request is generated till when the first instruction in the interrupt
routine is executed. Specifically, it consists of the time from when an interrupt request is generated till
when the instruction then executing is completed ((a) in Figure 9.6) and the time during which the interrupt sequence is executed ((b) in Figure 9.6).
Interrupt request generated
Interrupt request acknowledged
Time
Instruction
Interrupt sequence
(a)
Instruction in
interrupt routine
(b)
Interrupt response time
(a) The time from when an interrupt request is generated till when the instruction then
executing is completed. The length of this time varies with the instruction being
executed. The DIVX instruction requires the longest time, which is equal to 30 cycles
(without wait state, the divisor being a register).
(b) The time during which the interrupt sequence is executed. For details, see the table
below. Note, however, that the values in this table must be increased 2 cycles for the
DBC interrupt and 1 cycle for the address match and single-step interrupts.
Interrupt vector address SP value
Without wait
Even
Even
18 cycles
Even
Odd
19 cycles
Odd
Even
19 cycles
Odd
Odd
20 cycles
Figure 9.6 Interrupt response time
9.4.2 Variation of IPL when Interrupt Request is Accepted
When a maskable interrupt request is accepted, the interrupt priority level of the accepted interrupt is set
in the IPL.
When a software interrupt or special interrupt request is accepted, one of the interrupt priority levels listed
in Table 9.5 is set in the IPL. Shown in Table 9.5 are the IPL values of software and special interrupts
when they are accepted.
Table 9.5 IPL Level That is Set to IPL When A Software or Special Interrupt Is Accepted
Interrupt sources
_______
Watchdog timer, NMI, Oscillation stop and re-oscillation detection, Low volage detection
_________
Software, address match, DBC, single-step
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page 80 of 458
IPL setting
7
No change
9. Interrupts
M16C/29 Group
9.4.3 Saving Registers
In the interrupt sequence, the FLG register and PC are saved to the stack.
At this time, the 4 high-order bits of the PC and the 4 high-order (IPL) and 8 low-order bits of the FLG
register, 16 bits in total, are saved to the stack first. Next, the 16 low-order bits of the PC are saved.
Figure 9.7 shows the stack status before and after an interrupt request is accepted.
The other necessary registers must be saved in a program at the beginning of the interrupt routine. Use
the PUSHM instruction, and all registers except SP can be saved with a single instruction.
Stack
Address
MSB
Stack
Address
MSB
LSB
LSB
m–4
m–4
PCL
m–3
m–3
PCM
m–2
m–2
FLG L
m–1
m
Content of previous stack
m+1
Content of previous stack
Stack status before interrupt request
is acknowledged
[SP]
SP value before
interrupt request is
accepted.
m–1
FLG H
[SP]
New SP value
PCH
m
Content of previous stack
m+1
Content of previous stack
Stack status after interrupt request
is acknowledged
Figure 9.7 Stack Status Before and After Acceptance of Interrupt Request
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9. Interrupts
M16C/29 Group
The operation of saving registers carried out in the interrupt sequence is dependent on whether the SP(1),
at the time of acceptance of an interrupt request, is even or odd. If the stack pointer (1) is even, the FLG
register and the PC are saved, 16 bits at a time. If odd, they are saved in two steps, 8 bits at a time.
Figure 9.8 shows the operation of the saving registers.
NOTE:
1. When any INT instruction in software numbers 32 to 63 has been executed, this is the SP indicated
by the U flag. Otherwise, it is the ISP.
(1) SP contains even number
Address
Stack
Sequence in which order
registers are saved
[SP] – 5 (Odd)
[SP] – 4 (Even)
PCL
[SP] – 3 (Odd)
PCM
[SP] – 2 (Even)
FLG L
[SP] – 1 (Odd)
[SP]
FLG H
(2) Saved simultaneously,
all 16 bits
PCH
(Even)
(1) Saved simultaneously,
all 16 bits
Finished saving registers
in two operations.
(2) SP contains odd number
Address
Stack
Sequence in which order
registers are saved
[SP] – 5 (Even)
[SP] – 4 (Odd)
PCL
(3)
[SP] – 3 (Even)
PCM
(4)
[SP] – 2 (Odd)
FLG L
[SP] – 1 (Even)
[SP]
FLG H
Saved, 8 bits at a time
(1)
PCH
(2)
(Odd)
Finished saving registers
in four operations.
NOTE:
1. [SP] denotes the initial value of the SP when interrupt request is acknowledged.
After registers are saved, the SP content is [SP] minus 4.
Figure 9.8 Operation of Saving Register
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9. Interrupts
M16C/29 Group
9.4.4 Returning from an Interrupt Routine
The FLG register and PC in the state in which they were immediately before entering the interrupt sequence are restored from the stack by executing the REIT instruction at the end of the interrupt routine.
Thereafter the CPU returns to the program which was being executed before accepting the interrupt
request.
Return the other registers saved by a program within the interrupt routine using the POPM or similar
instruction before executing the REIT instruction.
9.5 Interrupt Priority
If two or more interrupt requests are generated while executing one instruction, the interrupt request that
has the highest priority is accepted.
For maskable interrupts (peripheral functions), any desired priority level can be selected using bits ILVL2 to
ILVL0. However, if two or more maskable interrupts have the same priority level, their interrupt priority is
resolved by hardware, with the highest priority interrupt accepted.
The watchdog timer and other special interrupts have their priority levels set in hardware. Figure 9.9
shows the priorities of hardware interrupts.
Software interrupts are not affected by the interrupt priority. If an instruction is executed, control branches
invariably to the interrupt routine.
Reset
High
NMI
DBC
Watchdog timer, oscillation stop,
re-oscillation detection,
low voltage detection
Peripheral function
Single step
Address match
Low
Figure 9.9 Hardware Interrupt Priority
9.5.1 Interrupt Priority Resolution Circuit
The interrupt priority resolution circuit is used to select the interrupt with the highest priority among those
requested.
Figure 9.10 shows the circuit that judges the interrupt priority level.
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9. Interrupts
M16C/29 Group
Priority level of each interrupt
Level 0 (initial value)
INT1
Highest
Timer B2
Timer B0
Timer A3
Timer A1
ICOC interrupt 1, I 2C bus interface
INT3
INT2
INT0
Timer B1
Timer A4
Timer A2
ICOC base timer, S CL/SDA
ICOC interrupt 0
UART1 reception
UART0 reception
UART2 reception, ACK2
A/D conversion, Key input interrupt
DMA1
UART 2 bus collision
Priority of peripheral function interrupts
(if priority levels are same)
SI/O4, INT5
Timer A0
UART1 transmission
UART0 transmission
UART2 transmission, NACK2
CAN 0 error
DMA0
SI/O3, INT4
CAN 0 transmission
CAN 0 reception
CAN 0 wakeup
IPL
I flag
Address match
Watchdog timer
Oscillation stop and
re-oscillation detection
Low voltage detection
DBC
NMI
Figure 9.10 Interrupts Priority Select Circuit
Rev. 1.12 Mar.30, 2007
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page 84 of 458
Lowest
Interrupt request level resolution output to clock
generating circuit (See Figure.7.1)
Interrupt
request
accepted
9. Interrupts
M16C/29 Group
______
9.6 INT Interrupt
_______
INTi interrupt (i=0 to 5) is triggered by the edges of external inputs. The edge polarity is selected using the
IFSRi bit in the IFSR register.
________
The INT5 input has an effective digital debounce function for a noise rejection. Refer to "19.6 Digital
________
Debounce function" for this detail. When using INT5 interrupt to exit stop mode, set the P17DDR register
to FF16 before entering stop mode.
________
________
________
To use the INT4 interrupt, set the IFSR6 bit in the IFSR register to 1 (INT4). To use the INT5 interrupt, set
________
the IFSR7 bit in the IFSR register to 1 (INT5).
After modifiying bit IFSR6 or IFSR7, clear the corresponding IR bit to 0 (interrupt not requested) before
enabling the interrupt.
Figure 9.11 shows the IFSR registers.
Interrupt Request Cause Select Register
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
IFSR
Bit Symbol
Address
035F16
After Reset
0016
Bit Name
Function
RW
IFSR0
INT0 interrupt polarity
switching bit
0 : One edge
1 : Both edges
(1)
RW
IFSR1
INT1 interrupt polarity
switching bit
0 : One edge
1 : Both edges
(1)
RW
IFSR2
INT2 interrupt polarity
switching bit
0 : One edge
1 : Both edges
(1)
RW
IFSR3
INT3 interrupt polarity
switching bit
0 : One edge
1 : Both edges
(1)
RW
IFSR4
INT4 interrupt polarity
switching bit
0 : One edge
1 : Both edges
(1)
RW
IFSR5
INT5 interrupt polarity
switching bit
0 : One edge
1 : Both edges
(1)
RW
IFSR6
Interrupt request cause
select bit
0 : SI/O3
1 : INT4
IFSR7
Interrupt request cause
select bit
0 : SI/O4
1 : INT5
(2)
RW
(2)
RW
NOTES:
1. When setting this bit to 1 (both edges), make sure the POL bit in registers INT0IC to INT5IC is set to
0 (falling edge).
2. When setting this bit to 0 (SI/O3, SI/O4), make sure the POL bit in registers S3IC and S4IC is set to
0 (falling edge).
Figure 9.11 IFSR Register
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9. Interrupts
M16C/29 Group
______
9.7 NMI Interrupt
_______
_______
An NMI interrupt request is generated when input on the NMI pin changes state from high to low, after the
_______
______
NMI interrupt was enabled by writing a 1 to bit 4 in the register PM2. The NMI interrupt is a non-maskable
interrupt, once it is enabled.
_______
The input level of this NMI interrupt input pin can be read by accessing the P8_5 bit in the P8 register.
_______
NMI is disabled by default after reset (the pin is a GPIO pin, P85) and can be enabled using bit 4 in the PM2
register. Once enabled, it can only be disabled by a reset signal.
_______
The NMI input has a digital debounce function for noise rejection. Refer to "19.6 Digital Debounce func_______
tion" for details. When using NMI interrupt to exit stop mode, set the NDDR register to FF16 before entering
stop mode.
9.8 Key Input Interrupt
A key input interrupt is generated when input on any of the P104 to P107 pins which has had bits PD10_7 to
PD10_4 in the PD10 register set to 0 (= input) goes low. Key input interrupts can be used for a key-on
wakeup function to get the MCU to exit stop or wait modes. However, if you intend to use the key input
interrupt, do not use P104 to P107 as analog input ports. Figure 9.12 shows the block diagram of the key
input interrupt. Note, however, that while input on any pin which has had bits PD10_7 to PD10_4 set to 0 (=
input mode) is pulled low, inputs on all other pins of the port are not detected as interrupts.
PU25 bit in the PUR2
register
Pull-up
transistor
PD10_7 bit in the
PD10 register
KUPIC register
PD10_7 bit in the PD10 register
KI3
PD10_6 bit in the
PD10 register
Pull-up
transistor
Interrupt control circuit
KI2
Pull-up
transistor
PD10_5 bit in the
PD10 register
KI1
Pull-up
transistor
PD10_4 bit in the
PD10 register
KI0
Figure 9.12 Key Input Interrupt
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Key input interrupt
request
9. Interrupts
M16C/29 Group
9.9 CAN0 Wake-up Interrupt
CAN0 wake-up interrupt occurs when a falling edge is input to CRX. The CAN0 wake-up interrupt is enabled when the PortEn bit is set to 1 (CTX/CRX function) and Sleep bit is set to 1(Sleep mode enabled) in
the C0CTLR register. Figure 9.13 shows the block diagram of the CAN0 wake-up interrupt.
C01WKIC register
Sleep bit in C0CTLR register
PortEn bit in C0CTLR register
Interrupt control circuit
CRX
CAN0 wake-up
interrupt request
Figure 9.13 CAN0 Wake-up Interrupt Block Diagram
9.10 Address Match Interrupt
An address match interrupt request is generated immediately before executing the instruction at the address indicated by the RMADi register (i=0 to 1). Set the start address of any instruction in the RMADi
register. Use bits AIER1 and AIER0 in the AIER register to enable or disable the interrupt. Note that the
address match interrupt is unaffected by the I flag and IPL. For address match interrupts, the value of the
PC that is saved to the stack area varies depending on the instruction being executed (refer to “Saving
Registers”).
(The value of the PC that is saved to the stack area is not the correct return address.) Therefore, follow one
of the methods described below to return from the address match interrupt.
• Rewrite the content of the stack and then use the REIT instruction to return.
• Restore the stack to its previous state before the interrupt request was accepted by using the POP or
similar other instruction and then use a jump instruction to return.
Table 9.6 shows the value of the PC that is saved to the stack area when an address match interrupt
request is accepted.
aFigure 9.14 shows registers AIER, RMAD0, and RMAD1.
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9. Interrupts
M16C/29 Group
Table 9.6 PC Value Saved in Stack Area When Address Match Interrupt Request Is Acknowledged
Value of the PC that is
saved to the stack area
Instruction at the address indicated by the RMADi register
• 2-byte op-code instruction
• 1-byte op-code instructions which are followed:
ADD.B:S
#IMM8,dest
SUB.B:S
#IMM8,dest
AND.B:S #IMM8,dest
OR.B:S
#IMM8,dest
MOV.B:S
#IMM8,dest
STZ.B
#IMM8,dest
STNZ.B
#IMM8,dest
STZX.B
#IMM81,#IMM82,dest
CMP.B:S
#IMM8,dest
PUSHM
src
POPM dest
JMPS
#IMM8
JSRS
#IMM8
MOV.B:S
#IMM,dest (However, dest=A0 or A1)
The address
indicated by the
RMADi register +2
The address
indicated by the
RMADi register +1
Instructions other than the above
Value of the PC that is saved to the stack area : Refer to “Saving Registers”.
Op-code is an abbreviation of Operation Code. It is a portion of instruction code.
Refer to Chapter 4 Instruction Code/Number of Cycles in M16C/60, M16C/20 Series Software Manual. Op-code is shown
as a bold-framed figure directly below the Syntax.
Table 9.7 Relationship Between Address Match Interrupt Sources and Associated Registers
Address match interrupt sources Address match interrupt enable bit Address match interrupt register
Address match interrupt 0
AIER0
RMAD0
Address match interrupt 1
AIER1
RMAD1
Address Match Interrupt Enable Register
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
AIER
Bit Symbol
Address
000916
After Reset
XXXXXX00 2
Bit Name
Function
RW
AIER0
Address match interrupt 0
enable bit
0 : Interrupt disabled
1 : Interrupt enabled
RW
AIER1
Address match interrupt 1
enable bit
0 : Interrupt disabled
1 : Interrupt enabled
RW
(b7-b2)
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined
Address Match Interrupt Register i (i = 0 to 1)
(b23)
b7
(b19)
b3
(b16)(b15)
b0 b7
(b8)
b0 b7
b0
Symbol
RMAD0
RMAD1
Function
Address setting register for address match interrupt
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined
Figure 9.14 AIER Register, RMAD0 and RMAD1 Registers
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Address
001216 to 0010 16
001616 to 0014 16
After Reset
X00000 16
X00000 16
Setting Range
RW
00000 16 to FFFFF 16
RW
10. Watchdog Timer
M16C/29 Group
10. Watchdog Timer
The watchdog timer is the function of detecting when the program is out of control. Therefore, we recommend
using the watchdog timer to improve reliability of a system. The watchdog timer contains a 15-bit counter which
counts down the clock derived by dividing the CPU clock using the prescaler. Whether to generate a watchdog
timer interrupt request or apply a watchdog timer reset as an operation to be performed when the watchdog timer
underflows after reaching the terminal count can be selected using the PM12 bit in the PM1 register. The PM12
bit can only be set to 1 (reset). Once this bit is set to 1, it cannot be set to 0 (watchdog timer interrupt) in a
program. Refer to 5.3 Watchdog Timer Reset for the details of watchdog timer reset.
When the main clock source is selected for CPU clock, on-chip oscillator clock, PLL clock, the WDC7 bit in the
WDC register value for prescaler can be chosen to be 16 or 128. If a sub-clock is selected for CPU clock, the
prescaler is always 2 no matter how the WDC7 bit is set. The period of watchdog timer can be calculated as
given below. The period of watchdog timer is, however, subject to an error due to the prescaler.
With main clock source chosen for CPU clock, on-chip oscillator clock, PLL clock
Prescaler dividing (16 or 128) X Watchdog timer count (32768)
Watchdog timer period =
CPU clock
With sub-clock chosen for CPU clock
Prescaler dividing (2) X Watchdog timer count (32768)
Watchdog timer period =
CPU clock
For example, when CPU clock is set to 16 MHz and the divide-by-N value for the prescale ris set to 16, the
watchdog timer period is approx. 32.8 ms.
The watchdog timer is initialized by writing to the WDTS register. The prescaler is initialized after reset. Note that
the watchdog timer and the prescaler both are inactive after reset, so that the watchdog timer is activated to start
counting by writing to the WDTS register.
Write the WDTS register with shorter cycle than the watchdog timer cycle. Set the WDTS register also in the
beginning of the watchdog timer interrupt routine.
In stop mode and wait mode, the watchdog timer and prescaler are stopped. Counting is resumed from the held
value when the modes or state are released.
Figure 10.1 shows the block diagram of the watchdog timer. Figure 10.2 shows the watchdog timer-related
registers.
Prescaler
1/16
1/128
CPU clock
1/2
CM07 = 0
WDC7 = 0
PM12 = 0
CM07 = 0
WDC7 = 1
PM22 = 0
CM07 = 1
PM22 = 1
Watchdog timer
interrupt request
Watchdog timer
PM12 = 1
Reset
On-chip oscillator clock
Set to 7FFF16
Write to WDTS register
Internal reset signal
(low active)
Figure 10.1 Watchdog Timer Block Diagram
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10. Watchdog Timer
M16C/29 Group
Watchdog Timer Control Register
b7
b6
b5
0 0
b4
b3
b2
b1
b0
Symbol
WDC
Address
000F16
Bit Symbol
(b4-b0)
(b5)
(b6)
WDC7
After Reset
00XXXXXX2
Bit Name
Function
High-order bits of watchdog timer
RW
RO
Reserved bit
Set to 0
RW
Reserved bit
Set to 0
RW
Prescaler select bit
0 : Divided by 16
1 : Divided by 128
RW
Watchdog Timer Start Register
b7
b0
Symbol
WDTS
Address
000E16
After Reset
Undefined
Function
The watchdog timer is initialized and starts counting after a write instruction
to this register. The watchdog timer value is always initialized to 7FFF16
regardless of whatever value is written.
RW
WO
Figure 10.2 WDC Register and WDTS Register
10.1 Count Source Protective Mode
In this mode, a on-chip oscillator clock is used for the watchdog timer count source. The watchdog timer
can be kept being clocked even when CPU clock stops as a result of run-away.
Before this mode can be used, the following register settings are required:
(1) Set the PRC1 bit in the PRCR register to 1 (enable writes to PM1 and PM2 registers).
(2) Set the PM12 bit in the PM1 register to 1 (reset when the watchdog timer underflows).
(3) Set the PM22 bit in the PM2 register to 1 (on-chip oscillator clock used for the watchdog timer count source).
(4) Set the PRC1 bit in the PRCR register to 0 (disable writes to PM1 and PM2 registers).
(5) Write to the WDTS register (watchdog timer starts counting).
Setting the PM22 bit to 1 results in the following conditions
• The on-chip oscillator continues oscillating even if the CM21 bit in the CM2 register is set to "0" (main clock
or PLL clock) (system clock of count source selected by the CM21 bit is valid)
• The on-chip oscillator starts oscillating, and the on-chip oscillator clock becomes the watchdog timer
count source.
Watchdog timer count (32768)
Watchdog timer period =
on-chip oscillator clock
• The CM10 bit in the CM1 register is disabled against write. (Writing a 1 has no effect, nor is stop mode entered.)
• The watchdog timer does not stop when in wait mode.
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11. DMAC
M16C/29 Group
11. DMAC
Note
Do not use SI/O4 interrupt request as a DMA request in the 64-pin package.
The DMAC (Direct Memory Access Controller) allows data to be transferred without the CPU intervention.
Two DMAC channels are included. Each time a DMA request occurs, the DMAC transfers one (8 or 16-bit)
data from the source address to the destination address. The DMAC uses the same data bus as used by
the CPU. Because the DMAC has higher priority of bus control than the CPU and because it makes use of
a cycle steal method, it can transfer one word (16 bits) or one byte (8 bits) of data within a very short time
after a DMA request is generated. Figure 11.1 shows the block diagram of the DMAC. Table 11.1 shows
the DMAC specifications. Figures 11.2 to 11.4 show the DMAC-related registers.
Address bus
DMA0 source pointer SAR0(20)
(addresses 0022 16 to 0020 16)
DMA0 destination pointer DAR0 (20)
(addresses 0026 16 to 0024 16)
DMA0 forward address pointer (20)
DMA0 transfer counter reload register TCR0 (16)
(addresses 0029 16, 0028 16)
(1)
DMA1 source pointer SAR1 (20)
(addresses 0032 16 to 0030 16)
DMA0 transfer counter TCR0 (16)
DMA1 destination pointer DAR1 (20)
DMA1 transfer counter reload register TCR1 (16)
DMA1 forward address pointer (20)
(addresses 0036 16 to 0034 16)
(1)
(addresses 0039 16, 0038 16)
DMA1 transfer counter TCR1 (16)
DMA latch high-order bits
DMA latch low-order bits
Data bus low-order bits
Data bus high-order bits
NOTE:
1. Pointer is incremented by a DMA request.
Figure 11.1 DMAC Block Diagram
A DMA request is generated by a write to the DSR bit in the DMiSL register (i = 0,1), as well as by an
interrupt request which is generated by any function specified by the DMS and bits DSEL3 to DSEL0 in the
DMiSL register. However, unlike in the case of interrupt requests, DMA requests are not affected by the I
flag and the interrupt control register, so that even when interrupt requests are disabled and no interrupt
request can be accepted, DMA requests are always accepted. Furthermore, because the DMAC does not
affect interrupts, the IR bit in the interrupt control register does not change state due to a DMA transfer.
A data transfer is initiated each time a DMA request is generated when the DMAE bit in the DMiCON
register is set to 1 (DMA enabled). However, if the cycle in which a DMA request is generated is faster than
the DMA transfer cycle, the number of transfer requests generated and the number of times data is transferred may not match. For details, refer to “DMA Requests”.
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11. DMAC
M16C/29 Group
Table 11.1 DMAC Specifications
Item
No. of channels
Transfer memory space
Maximum No. of bytes transferred
DMA request factors (1,
Specification
2 (cycle steal method)
• From any address in the 1M bytes space to a fixed address
• From a fixed address to any address in the 1M bytes space
• From a fixed address to a fixed address
128K bytes (with 16-bit transfers) or 64K bytes (with 8-bit transfers)
2)
________
________
Falling edge of INT0 or INT1
________
________
Both edge of INT0 or INT1
Timer A0 to timer A4 interrupt requests
Timer B0 to timer B2 interrupt requests
UART0 transfer, UART0 reception interrupt requests
UART1 transfer, UART1 reception interrupt requests
UART2 transfer, UART2 reception interrupt requests
SI/O3, SI/O4 interrupt requests
A/D conversion interrupt requests
Timer S(IC/OC) requests
Software triggers
Channel priority
DMA0 > DMA1 (DMA0 takes precedence)
Transfer unit
8 bits or 16 bits
Transfer address direction
forward or fixed (The source and destination addresses cannot both be
in the forward direction)
Transfer mode Single transfer Transfer is completed when the DMAi transfer counter (i = 0,1)
underflows after reaching the terminal count
Repeat transfer When the DMAi transfer counter underflows, it is reloaded with the value
of the DMAi transfer counter reload register and a DMA transfer is con
tinued with it
DMA interrupt request generation timing When the DMAi transfer counter underflowed
DMA startup
Data transfer is initiated each time a DMA request is generated when
the
DMAE bit in the DMAiCON register = 1 (enabled)
DMA shutdown Single transfer • When the DMAE bit is set to 0 (disabled)
• After the DMAi transfer counter underflows
Repeat transfer When the DMAE bit is set to 0 (disabled)
Reload timing for forward ad- When a data transfer is started after setting the DMAE bit to 1 (en
dress pointer and transfer
abled), the forward address pointer is reloaded with the value of the
counter
SARi or the DARi pointer whichever is specified to be in the forward
direction and the DMAi transfer counter is reloaded with the value of the
DMAi transfer counter reload register
NOTES:
1. DMA transfer is not effective to any interrupt. DMA transfer is affected neither by the I flag nor by the
interrupt control register.
2. The selectable causes of DMA requests differ with each channel.
3. Make sure that no DMAC-related registers (addresses 002016 to 003F16) are accessed by the DMAC.
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11. DMAC
M16C/29 Group
DMA0 Request Cause Select Register
b7
b6
b5
b4
b3
b2
b1
Symbol
DM0SL
b0
Bit Symbol
Address
03B816
Bit Name
After Reset
0016
Function
DSEL0
DSEL1
DSEL2
RW
DMA request cause
select bit
Refer to note (1)
RW
RW
DSEL3
(b5-b4)
RW
RW
Nothing is assigned. When write, set to 0.
When read, their content are 0
DMS
DMA request cause
expansion select bit
0: Basic cause of request
1: Extended cause of request
RW
DSR
Software DMA request
bit
A DMA request is generated by
setting this bit to 1 when the DMS bit
is 0 (basic cause) and bits DSEL3 to
DSEL0 are 00012 (software trigger).
The value of this bit when read is 0
RW
NOTE:
1. The causes of DMA0 requests can be selected by a combination of DMS bit and bits DSEL3 to DSEL0 in the
manner described below.
DSEL3 to DSEL0
0 0 0 02
0 0 0 12
0 0 1 02
0 0 1 12
0 1 0 02
0 1 0 12
0 1 1 02
0 1 1 12
1 0 0 02
1 0 0 12
1 0 1 02
1 0 1 12
1 1 0 02
1 1 0 12
1 1 1 02
1 1 1 12
DMS=0(basic cause of request)
Falling edge of INT0 pin
Software trigger
Timer A0
Timer A1
Timer A2
Timer A3
Timer A4
Timer B0
Timer B1
Timer B2
UART0 transmit
UART0 receive
UART2 transmit
UART2 receive
A/D conversion
UART1 transmit
Figure 11.2 DM0SL Register
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DMS=1(extended cause of request)
IC/OC base timer
–
IC/OC channel 0
IC/OC channel 1
–
–
Two edges of INT0 pin
–
–
–
IC/OC channel 2
IC/OC channel 3
IC/OC channel 4
IC/OC channel 5
IC/OC channel 6
IC/OC channel 7
11. DMAC
M16C/29 Group
DMA1 Request Cause Select Register
b7
b6
b5
b4
b3
b2
b1
Symbol
DM1SL
b0
Address
03BA16
DSEL1
DSEL2
Function
Bit Name
Bit Symbol
DSEL0
After Reset
0016
DMA request cause
select bit
Refer to note (1)
RW
RW
RW
RW
DSEL3
RW
(b5-b4)
Nothing is assigned. If necessary, set
to 0. When read, their contents are 0
DMS
DMA request cause
expansion select bit
0: Basic cause of request
1: Extended cause of request
RW
Software DMA
request bit
A DMA request is generated by
setting this bit to 1 when the DMS bit
is 0 (basic cause) and the DSEL3 to
DSEL0 bits are 0001 2
(software trigger).
The value of this bit when read is 0
RW
DSR
NOTES:
1. The causes of DMA1 requests can be selected by a combination of DMS bit and bits DSEL3 to DSEL0 in the
manner described below.
DSEL3 to DSEL0
0 0 0 02
0 0 0 12
0 0 1 02
0 0 1 12
0 1 0 02
0 1 0 12
0 1 1 02
0 1 1 12
1 0 0 02
1 0 0 12
1 0 1 02
1 0 1 12
1 1 0 02
1 1 0 12
1 1 1 02
1 1 1 12
DMS=0(basic cause of request)
Falling edge of INT1 pin
Software trigger
Timer A0
Timer A1
Timer A2
Timer A3
Timer A4
Timer B0
Timer B1
Timer B2
UART0 transmit
UART0 receive
UART2 transmit
UART2 receive/ACK2
A/D conversion
UART1 receive
DMS=1(extended cause of request)
IC/OC base timer
–
IC/OC channel 0
IC/OC channel 1
–
SI/O3
SI/O4
Two edges of INT1
–
–
IC/OC channel 2
IC/OC channel 3
IC/OC channel 4
IC/OC channel 5
IC/OC channel 6
IC/OC channel 7
DMAi Control Register(i=0,1)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
DM0CON
DM1CON
Address
002C16
003C16
After Reset
00000X002
00000X002
Bit Symbol
Bit Name
DMBIT
Transfer unit bit select bit
0: 16 bits
1: 8 bits
RW
DMASL
Repeat transfer mode
select bit
0: Single transfer
1: Repeat transfer
RW
DMAS
DMA request bit
0: DMA not requested
1: DMA requested
DMA enable bit
0: Disabled
1: Enabled
RW
DSD
Source address direction
select bit (2)
0: Fixed
1: Forward
RW
DAD
Destination address
direction select bit (2)
0: Fixed
1: Forward
RW
DMAE
(b7-b6)
Function
Nothing is assigned. If necessary, set to 0. When
read, their contents are 0
NOTES:
1. The DMAS bit can be set to 0 by writing 0 by program (This bit remains unchanged even if 1 is written).
2. At least one of bits DAD and DSD must be set to 0 (address direction fixed).
Figure 11.3 DM1SL Register, DM0CON Register, and DM1CON Registers
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RW
RW
(1)
11. DMAC
M16C/29 Group
DMAi Source Pointer (i = 0, 1) (1)
(b23)
b7
(b19)
b3
(b16)(b15)
b0 b7
(b8)
b0 b7
Symbol
SAR0
SAR1
b0
Address
002216 to 0020 16
003216 to 0030 16
Function
Set the source address of transfer
After Reset
Undefined
Undefined
Setting Range
RW
00000 16 to FFFFF 16
RW
Nothing is assigned. If necessary, set 0. When read, the contents
are 0
NOTE:
1. If the DSD bit in the DMiCON register is 0 (fixed), this register can only be written to when the DMAE bit in the
DMiCON register is set to 0 (DMA disabled).
If the DSD bit is set to 1 (forward direction), this register can be written to at any time.
If the DSD bit is set to 1 and the DMAE bit is set to 1 (DMA enabled), the DMAi forward address pointer can be
read from this register. Otherwise, the value written to it can be read.
DMAi Destination Pointer (i = 0, 1)(1)
(b23)
b7
(b19)
b3
(b16) (b15)
b0 b7
(b8)
b0 b7
b0
Symbol
DAR0
DAR1
Address
002616 to 0024 16
003616 to 0034 16
Function
Set the destination address of transfer
After Reset
Undefined
Undefined
Setting Range
RW
00000 16 to FFFFF 16
RW
Nothing is assigned. If necessary, set 0. When read, the contents
are 0
NOTE:
1. If the DAD bit in the DMiCON register is 0 (fixed), this register can only be written to when the DMAE bit in the
DMiCON register is set to 0 (DMA disabled).
If the DAD bit is set to 1 (forward direction), this register can be written to at any time.
If the DAD bit is set to 1 and the DMAE bit is set to 1 (DMA enabled), the DMAi forward address pointer can be
read from this register. Otherwise, the value written to it can be read.
DMAi Transfer Counter (i = 0, 1)
(b15)
b7
(b8)
b0 b7
b0
Symbol
TCR0
TCR1
Address
0029 16, 0028 16
0039 16, 0038 16
Function
Set the transfer count minus 1. The written value is
stored in the DMAi transfer counter reload register,
and when the DMAE bit in the DMiCON register is
set to 1 (DMA enabled) or the DMAi transfer
counter underflows when the DMASL bit in the
DMiCON register is 1 (repeat transfer), the value
of the DMAi transfer counter reload register is
transferred to the DMAi transfer counter.
When read, the DMAi transfer counter is read
Figure 11.4 SAR0, SAR1, DAR0, DAR1, TCR0, and TCR1 Registers
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After Reset
Undefined
Undefined
Setting Range
RW
0000 16 to FFFF 16
RW
11. DMAC
M16C/29 Group
11.1 Transfer Cycles
The transfer cycle consists of a memory or SFR read (source read) bus cycle and a write (destination write)
bus cycle. The number of read and write bus cycles is affected by the source and destination addresses of
transfer. Furthermore, the bus cycle itself is extended by a software wait.
11.1.1 Effect of Source and Destination Addresses
If the transfer unit is 16 bits and the source address of transfer begins with an odd address, the source
read cycle consists of one more bus cycle than when the source address of transfer begins with an even
address.
Similarly, if the transfer unit is 16 bits and the destination address of transfer begins with an odd address,
the destination write cycle consists of one more bus cycle than when the destination address of transfer
begins with an even address.
11.1.2 Effect of Software Wait
For memory or SFR accesses in which one or more software wait states are inserted, the number of bus
cycles required for that access increases by an amount equal to software wait states.
Figure 11.5 shows the example of the cycles for a source read. For convenience, the destination write
cycle is shown as one cycle and the source read cycles for the different conditions are shown. In reality, the
destination write cycle is subject to the same conditions as the source read cycle, with the transfer cycle
changing accordingly. When calculating transfer cycles, take into consideration each condition for the
source read and the destination write cycle, respectively. For example, when data is transferred in 16 bit
units and when both the source address and destination address are an odd address ((2) in Figure 11.5),
two source read bus cycles and two destination write bus cycles are required.
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11. DMAC
M16C/29 Group
(1) When the transfer unit is 8 or 16 bits and the source of transfer is an even address
CPU clock
Address
bus
CPU use
Dummy
cycle
Destination
Source
CPU use
RD signal
WR signal
Data
bus
CPU use
Dummy
cycle
Destination
Source
CPU use
(2) When the transfer unit is 16 bits and the source address of transfer is an odd address.
CPU clock
Address
bus
CPU use
Source
Source + 1
Destination
Dummy
cycle
CPU use
RD signal
WR signal
Data
bus
CPU use
Source + 1
Source
Destination
Dummy
cycle
CPU use
(3) When the source read cycle under condition (1) has one wait state inserted
CPU clock
Address
bus
CPU use
Destination
Source
Dummy
cycle
CPU use
RD signal
WR signal
Data
bus
CPU use
Source
Destination
Dummy
cycle
CPU use
(4) When the source read cycle under condition (2) has one wait state inserted
CPU clock
Address
bus
CPU use
Source
Source + 1
Destination
Dummy
cycle
CPU use
RD signal
WR signal
Data
bus
CPU use
Source
Source + 1
Destination
Dummy
cycle
CPU use
NOTE:
1. The same timing changes occur with the respective conditions at the destination as at the source.
Figure 11.5 Transfer Cycles for Source Read
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11. DMAC
M16C/29 Group
11.2. DMA Transfer Cycles
Any combination of even or odd transfer read and write adresses is possible. Table 11.2 shows the
number of DMA transfer cycles. Table 11.3 shows the Coefficient j, k.
The number of DMAC transfer cycles can be calculated as follows:
No. of transfer cycles per transfer unit = No. of read cycles x j + No. of write cycles x k
Table 11.2 DMA Transfer Cycles
Transfer unit
Access address
8-bit transfers
Even
(DMBIT= 1)
Odd
16-bit transfers
Even
(DMBIT= 0)
Odd
No. of read cycles
1
1
1
2
Table 11.3 Coefficient j, k
Internal Area
Internal ROM, RAM
No wait
With wait
j
1
k
1
SFR
2 wait
1 wait
(1)
(1)
2
2
3
2
2
3
NOTE:
1. Depends on the set value of PM20 bit in PM2 register
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No. of write cycles
1
1
1
2
11. DMAC
M16C/29 Group
11.3 DMA Enable
When a data transfer starts after setting the DMAE bit in the DMiCON register (i = 0, 1) to 1 (enabled), the
DMAC operates as follows:
(a) Reload the forward address pointer with the SARi register value when the DSD bit in DMiCON register
is 1 (forward) or the DARi register value when the DAD bit in the DMiCON register is 1 (forward).
(b) Reload the DMAi transfer counter with the DMAi transfer counter reload register value.
If the DMAE bit is set to 1 again while it remains set, the DMAC performs the above operation. However,
if a DMA request may occur simultaneously when the DMAE bit is being written, follow the steps below.
(1) Write 1 to bits DMAE and DMAS in DMiCON register simultaneously.
(2) Make sure that the DMAi is in an initial state as described above (a) and (b) by program.
If the DMAi is not in an initial state, the above steps should be repeated.
11.4 DMA Request
The DMAC can generate a DMA request as triggered by the cause of request that is selected with the DMS
bit and bits DSEL3 to DSEL0 in the DMiSL register (i = 0, 1) on either channel. Table 11.4 shows the timing
at which the DMAS bit changes state.
Whenever a DMA request is generated, the DMAS bit is set to 1 (DMA requested) regardless of whether or
not the DMAE bit is set. If the DMAE bit was set to 1 (enabled) when this occurred, the DMAS bit is set to
0 (DMA not requested) immediately before a data transfer starts. This bit cannot be set to 1 by program (it
can only be set to 0).
The DMAS bit may be set to 1 when the DMS or the DSEL3 to DSEL0 bits change state. Therefore, always
be sure to set the DMAS bit to 0 after changing the DMS or the DSEL3 to DSEL0 bits.
Because if the DMAE bit is set to 1, a data transfer starts immediately after a DMA request is generated, the
DMAS bit in almost all cases is 0 when read by program. Read the DMAE bit to determine whether the
DMAC is enabled.
Table 11.4 Timing at Which the DMAS Bit Changes State
DMAS Bit in the DMiCON Register
DMA Factor
Timing at which the bit is set to 1
Timing at which the bit is set to 0
Software trigger
When the DSR bit in the DMiSL
register is set to 1
Peripheral function
When the interrupt control register
for the peripheral function that is
selected by bits DSEL3 to DSEL0
and the DMS bit in the DMiSL
register has its IR bit set to 1
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• Immediately before a data transfer starts
• When set by writing 0 by program
11. DMAC
M16C/29 Group
11.5 Channel Priority and DMA Transfer Timing
If both DMA0 and DMA1 are enabled and DMA transfer request signals from DMA0 and DMA1 are detected active in the same sampling period (one period from a falling edge to the next falling edge of CPU
clock), the DMAS bit on each channel is set to 1 (DMA requested) at the same time. In this case, the DMA
requests are arbitrated according to the channel priority, DMA0 > DMA1. The following describes DMAC
operation when DMA0 and DMA1 requests are detected active in the same sampling period. Figure 11.6
shows an example of DMA transfer effected by external factors.
DMA0 request having priority is received first to start a transfer when a DMA0 request and DMA1 request
are generated simultanelously. After one DMA0 transfer is completed, a bus arbitration is returned to the
CPU. When the CPU has completed one bus access, a DMA1 transfer starts. After one DMA1 transfer is
completed, the bus arbitration is again returned to the CPU.
In addition, DMA requsts cannot be counted up since each channel has one DMAS bit. Therefore, when
DMA requests, as DMA1 in Figure 11.6 occurs more than one time, the DAMS bit is set to 0 as soon
as getting the bus arbitration. The bus arbitration is returned to the CPU when one transfer is completed.
An example where DMA requests for external causes are detected active at the same
CPU clock
DMA0
Obtainment
of the bus
right
DMA1
CPU
INT0
DMA0
request bit
INT1
DMA1
request bit
Figure 11.6 DMA Transfer by External Factors
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12. Timers
M16C/29 Group
12. Timers
Eight 16-bit timers, each capable of operating independently of the others, can be classified by function as
either timer A (five) and timer B (three). The count source for each timer acts as a clock, to control such
timer operations as counting, reloading, etc. Figures 12.1 and 12.2 show block diagrams of timer A and
timer B configuration, respectively.
• Main clock
f1
• PLL clock
• On-chip oscillator
clock
1/2
1/8
f2 PCLK0 bit = 0
f1 or f2
PCLK0 bit = 1
1/4
f1 or f2 f8 f32 fC32
f8
f32
Clock prescaler
1/32
XCIN
Set the CPSR bit in the
CPSRF register to 1
(prescaler reset)
• Timer mode
• One-shot timer mode
• Pulse Width Measuring (PWM) mode
TA0IN
Noise
filter
Timer A0
TA1IN
Timer A1
TA2IN
Timer A2
TA3IN
Timer A3
TA4IN
Timer A4
• Event counter mode
Timer B2 overflow or underflow
Figure 12.1 Timer A Configuration
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Timer A3 interrupt
• Event counter mode
• Timer mode
• One-shot timer mode
• PWM mode
Noise
filter
Timer A2 interrupt
• Event counter mode
• Timer mode
• One-shot timer mode
• PWM mode
Noise
filter
Timer A1 interrupt
• Event counter mode
• Timer mode
• One-shot timer mode
• PWM mode
Noise
filter
Timer A0 interrupt
• Event counter mode
• Timer mode
• One-shot timer mode
• PWM mode
Noise
filter
fC32
Reset
Timer A4 interrupt
12. Timer
M16C/29 Group
• Main clock
f1
• PLL clock
• On-chip oscillator
clock
1/2
1/8
f2 PCLK0 bit = 0
f1 or f2
PCLK0 bit = 1
1/4
f1 or f2 f8 f32 fC32
f8
f32
Clock prescaler
1/32
XCIN
Set the CPSR bit in the
CPSRF register to 1
(prescaler reset)
Timer B2 overflow or underflow ( to Timer A count source)
• Timer mode
• Pulse width measuring mode,
pulse period measuring mode
TB0IN
fC32
Reset
Noise
filter
Timer B0
Timer B0 interrupt
• Event counter mode
• Timer mode
• Pulse width measuring mode,
pulse period measuring mode
TB1IN
Noise
filter
Timer B1
Timer B1 interrupt
• Event counter mode
• Timer mode
• Pulse width measuring mode,
pulse period measuring mode
TB2IN
Noise
filter
Timer B2
• Event counter mode
Figure 12.2. Timer B Configuration
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Timer B2 interrupt
12. Timer A
M16C/29 Group
12.1 Timer A
Figure 12.3 shows a block diagram of the timer A. Figures 12.4 to 12.6 show registers related to the timer A.
The timer A supports the following four modes. Except in event counter mode, timers A0 to A4 all have the
same function. Use bits TMOD1 to TMOD0 in the TAiMR register (i = 0 to 4) to select the desired mode.
• Timer mode: The timer counts an internal count source.
• Event counter mode: The timer counts pulses from an external device or overflows and underflows of
other timers.
• One-shot timer mode: The timer outputs a pulse only once before it reaches the minimum count 000016.
• Pulse width modulation (PWM) mode: The timer outputs pulses in a given width successively.
Data bus high-order bits
f1 or f 2
f8
f32
fC32
Clock source
selection
Data bus low-order bits
• Timer
• One shot
• PWM
High-order
8 bits
Low-order
8 bits
• Timer
(gate function)
Reload register
Clock selection
• Event counter
Counter
Polarity
selection
Increment/decrement
TAiIN
(i = 0 to 4)
Always counts down except
in event counter mode
TABSR register
Clock selection
TAi
Timer A0
Timer A1
Timer A2
Timer A3
Timer A4
(1)
TB2 overflow
To external
trigger circuit
(1)
TAj overflow
(j = i – 1. however, j = 4 when i = 0)
Decrement
UDF register
TAk overflow
Addresses
038716 - 038616
038916 - 038816
038B16 - 038A16
038D16 - 038C 16
038F 16 - 038E16
TAj
Timer A4
Timer A0
Timer A1
Timer A2
Timer A3
TAk
Timer A1
Timer A2
Timer A3
Timer A4
Timer A0
(k = i + 1. however, k = 0 when i = 4)
Pulse output
TAi OUT
(i = 0 to 4)
Toggle flip-flop
NOTE:
1. Overflow or underflow
Figure 12.3 Timer A Block Diagram
Timer Ai Mode Register (i=0 to 4)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
TA0MR to TA4MR
Bit Symbol
TMOD0
Address
0396 16 to 039A 16
Bit Name
Operation mode select bit
TMOD1
MR0
MR1
Function
b1 b0
RW
0 0 : Timer mode
0 1 : Event counter mode
1 0 : One-shot timer mode
1 1 : Pulse width modulation
(PWM) mode
RW
Function varies with each
operation mode
RW
RW
RW
MR2
RW
MR3
RW
TCK0
TCK1
Figure 12.4 TA0MR to TA4MR Registers
Rev. 1.12 Mar.30, 2007
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After Reset
0016
page 103 of 458
Count source select bit
Function varies with each
operation mode
RW
RW
12. Timer A
M16C/29 Group
Timer Ai Register (i= 0 to 4) (1)
(b8)
b0 b7
(b15)
b7
b0
Mode
Symbol
TA0
TA1
TA2
TA3
TA4
Address
0387 16, 0386 16
0389 16, 0388 16
038B 16, 038A 16
038D 16, 038C 16
038F 16, 038E 16
Function
Timer
mode
Event
counter
mode
Divide the count source by n + 1 where n = set
value
Divide the count source by FFFF16 – n + 1
where n = set value when counting up or by n +
1 when counting down(5)
Divide the count source by n where n = set
One-shot
timer mode value and cause the timer to stop
Pulse width Modify the pulse width as follows:
modulation PWM period: (216 – 1) / fj
mode
High level PWM pulse width: n / fj where n = set
(16-bit PWM) value, fj = count source frequency
Pulse width Modify the pulse width as follows:
modulation PWM period: (28 – 1) x (m + 1)/ fj
High level PWM pulse width: (m + 1)n / fj where
mode
(8-bit PWM) n = high-order address set value, m = low-order
address set value, fj = count source frequency
After Reset
Undefined
Undefined
Undefined
Undefined
Undefined
Setting Range
RW
000016 to FFFF16
RW
000016 to FFFF16
RW
000016 to FFFF16
(2, 4)
000016 to FFFE16
(3, 4)
WO
WO
0016 to FE16
(High-order address)
WO
0016 to FF16
(Low-order address)
(3, 4)
NOTES:
1. The register must be accessed in 16 bit units.
2. If the TAi register is set to 000016, the counter does not work and timer Ai interrupt requests are not
generated either. Furthermore, if “pulse output” is selected, no pulses are output from the TAiOUT pin.
3. If the TAi register is set to 000016, the pulse width modulator does not work, the output level on the
TAiOUT pin remains low, and timer Ai interrupt requests are not generated either. The same applies
when the 8 high-order bits of the timer TAi register are set to 000016 while operating as an 8-bit pulse
width modulator.
4. Use the MOV instruction to write to the TAi register.
5. The timer counts pulses from an external device or overflows or underflows in other timers.
Count Start Flag
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
TABSR
Bit Symbol
Address
0380 16
After Reset
0016
Bit Name
Function
RW
TA0S
Timer A0 count start flag
TA1S
Timer A1 count start flag
TA2S
Timer A2 count start flag
RW
TA3S
Timer A3 count start flag
RW
TA4S
Timer A4 count start flag
RW
TB0S
Timer B0 count start flag
RW
TB1S
Timer B1 count start flag
RW
TB2S
Timer B2 count start flag
RW
0 : Stops counting
1 : Starts counting
RW
RW
Up/Down Flag (1)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
UDF
Bit Symbol
Address
038416
Bit Name
TA0UD
Timer A0 up/down flag
TA1UD
Timer A1 up/down flag
TA2UD
Timer A2 up/down flag
TA3UD
Timer A3 up/down flag
TA4UD
Timer A4 up/down flag
TA2P
Timer A2 two-phase pulse
signal processing select bit
TA3P
Timer A3 two-phase pulse
signal processing select bit
TA4P
Timer A4 two-phase pulse
signal processing select bit
After Reset
0016
Function
RW
0: Down count
1: Up count
Enabled by setting the MR2 bit in
the TAiMR register to 0
(= switching source in UDF register)
during event counter mode
RW
0: two-phase pulse signal
processing disabled
1: two-phase pulse signal
processing enabled (2, 3)
WO
RW
RW
RW
RW
WO
WO
NOTES:
1. Use MOV instruction to write to this register.
2. Make sure the port direction bits for the TA2IN to TA4IN and TA2OUT to TA4OUT pins are set to 0
input mode.
3. When the two-phase pulse signal processing function is not used, set the corresponding bit to 0.
Figure 12.5 TA0 to TA4 Registers, TABSR Register, and UDF Register
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12. Timer A
M16C/29 Group
One-shot Start Flag
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
ONSF
Bit Symbol
Address
038216
Function
RW
The timer starts counting by setting
this bit to 1 while bits TMOD1 and
TMOD0 in the TAiMR register (i = 0
to 4) = 10 2 (= one-shot timer mode)
and the MR2 bit in the TAiMR
register = 0 (=TAiOS bit enabled).
When read, its content is 0
RW
Bit Name
TA0OS
Timer A0 one-shot start flag
TA1OS
Timer A1 one-shot start flag
TA2OS
Timer A2 one-shot start flag
TA3OS
Timer A3 one-shot start flag
TA4OS
Timer A4 one-shot start flag
TAZIE
Z-phase input enable bit
TA0TGL
After Reset
0016
Timer A0 event/trigger
select bit
TA0TGH
0: Z-phase input disabled
1: Z-phase input enabled
b7 b6
0 0: Input on TA0 IN is selected (1)
0 1: TB2 overflow is selected (2)
1 0: TA4 overflow is selected (2)
1 1: TA1 overflow is selected (2)
RW
RW
RW
RW
RW
RW
RW
NOTES:
1. Make sure the PD7_1 bit in the PD7 register is set to 0 (input mode).
2. Overflow or underflow.
Trigger Select Register
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
TRGSR
Bit Symbol
TA1TGL
Address
038316
Bit Name
Timer A1 event/trigger
select bit
TA1TGH
TA2TGL
Timer A2 event/trigger
select bit
TA2TGH
TA3TGL
Timer A3 event/trigger
select bit
TA3TGH
TA4TGL
After Reset
0016
Timer A4 event/trigger
select bit
TA4TGH
Function
b1 b0
0 0: Input on TA1 IN is selected (1)
0 1: TB2 is selected (2)
1 0: TA0 is selected (2)
1 1: TA2 is selected (2)
b3 b2
0 0: Input on TA2 IN is selected (1)
0 1: TB2 is selected (2)
1 0: TA1 is selected (2)
1 1: TA3 is selected (2)
b5 b4
0 0: Input on TA3 IN is selected (1)
0 1: TB2 is selected (2)
1 0: TA2 is selected (2)
1 1: TA4 is selected (2)
b7 b6
0 0: Input on TA4 IN is selected (1)
0 1: TB2 is selected (2)
1 0: TA3 is selected (2)
1 1: TA0 is selected (2)
RW
RW
RW
RW
RW
RW
RW
RW
RW
NOTES:
1. Make sure the port direction bits for the TA1IN to TA4IN pins are set to 0 ( input mode).
2. Overflow or underflow.
Clock Prescaler Reset Flag
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
CPSRF
Bit Symbol
Address
038116
After Reset
0XXXXXXX 2
Bit Name
Function
(b6-b0)
Nothing is assigned. If necessary, set to 0.
When read, their contents are undefined
CPSR
Clock prescaler reset flag
Setting this bit to 1 initializes the
prescaler for the timekeeping clock.
(When read, its content is 0)
Figure 12.6 ONSF Register, TRGSR Register, and CPSRF Register
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RW
RW
12. Timer A
M16C/29 Group
12.1.1 Timer Mode
In timer mode, the timer counts a count source generated internally (see Table 12.1). Figure 12.7 shows
TAiMR register in timer mode.
Table 12.1 Specifications in Timer Mode
Item
Count source
Count operation
Specification
f1, f2, f8, f32, fC32
• Decrement
• When the timer underflows, it reloads the reload register contents and continues counting
1/(n+1) n: set value of TAi register (i= 0 to 4)
000016 to FFFF16
Set TAiS bit in the TABSR register to 1 (start counting)
Set TAiS bit to 0 (stop counting)
Timer underflow
I/O port or gate input
I/O port or pulse output
Count value can be read by reading TAi register
• When not counting and until the 1st count source is input after counting start
Value written to TAi register is written to both reload register and counter
• When counting (after 1st count source input)
Value written to TAi register is written to only reload register
(Transferred to counter when reloaded next)
• Gate function
Counting can be started and stopped by an input signal to TAiIN pin
• Pulse output function
Whenever the timer underflows, the output polarity of TAiOUT pin is inverted.
When not counting, the pin outputs a low.
Divide ratio
Count start condition
Count stop condition
Interrupt request generation timing
TAiIN pin function
TAiOUT pin function
Read from timer
Write to timer
Select function
Timer Ai Mode Register (i=0 to 4)
b7
b6
b5
b4
0
b3
b2
b1
b0
0 0
Symbol
TA0MR to TA4MR
Bit Symbol
TMOD0
TMOD1
MR0
MR1
Address
0396 16 to 039A 16
After Reset
0016
Bit Name
Operation mode
select bit
Function
b1 b0
0 0: Timer mode
Pulse output function
select bit
0: Pulse is not output
(TA iOUT pin is a normal port pin)
1: Pulse is output
(TA iOUT pin is a pulse output pin)
Gate function select bit
b4 b3
MR2
MR3
Set to 0 in timer mode
TCK0
Count source select bit
TCK1
0 0: Gate function not available
} (TAi IN pin functions as I/O port)
0 1:
1 0: Counts while input on the TAi IN pin
is low (1)
1 1: Counts while input on the TAi IN pin
is high (1)
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page 106 of 458
RW
RW
RW
RW
RW
b7 b6
0 0: f1 or f2
0 1: f8
1 0: f32
1 1: fC32
NOTE:
1. The port direction bit for the TAi IN pin must be set to 0 ( input mode).
Figure 12.7 Timer Ai Mode Register in Timer Mode
RW
RW
RW
RW
12. Timer A
M16C/29 Group
12.1.2 Event Counter Mode
In event counter mode, the timer counts pulses from an external device or overflows and underflows of
other timers. Timers A2, A3, and A4 can count two-phase external signals. Table 12.2 lists specifications in event counter mode (when not processing two-phase pulse signal). Table 12.3 lists specifications in event counter mode (when processing two-phase pulse signal with the timers A2, A3 and A4).
Figure 12.8 shows TAiMR register in event counter mode (when not processing two-phase pulse signal).
Figure 12.9 shows TA2MR to TA4MR registers in event counter mode (when processing two-phase
pulse signal with the timers A2, A3 and A4).
Table 12.2 Specifications in Event Counter Mode (when not processing two-phase pulse signal)
Item
Specification
Count source
• External signals input to TAiIN pin (i=0 to 4) (effective edge can be selected
in program)
• Timer B2 overflows or underflows,
timer Aj (j=i-1, except j=4 if i=0) overflows or underflows,
timer Ak (k=i+1, except k=0 if i=4) overflows or underflows
Count operation
• Increment or decrement can be selected by external signal or program
• When the timer overflows or underflows, it reloads the reload register contents and continues counting. When operating in free-running mode, the
timer continues counting without reloading.
Divided ratio
1/ (FFFF16 - n + 1) for increment
1/ (n + 1) for down-count
n : set value of TAi register 000016 to FFFF16
Count start condition
Set TAiS bit in the TABSR register to 1 (start counting)
Count stop condition
Set TAiS bit to 0 (stop counting)
Interrupt request generation timing Timer overflow or underflow
TAiIN pin function
I/O port or count source input
TAiOUT pin function
I/O port, pulse output, or up/down-count select input
Read from timer
Count value can be read by reading TAi register
Write to timer
• When not counting and until the 1st count source is input after counting start
Value written to TAi register is written to both reload register and counter
• When counting (after 1st count source input)
Value written to TAi register is written to only reload register
(Transferred to counter when reloaded next)
Select function
• Free-run count function
Even when the timer overflows or underflows, the reload register content is
not reloaded to it
• Pulse output function
Whenever the timer underflows or underflows, the output polarity of TAiOUT
pin is inverted . When not counting, the pin outputs a low.
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12. Timer A
M16C/29 Group
Timer Ai Mode Register (i=0 to 4)
(When not using two-phase pulse signal processing)
b7
b6
b5
b4
b3
0
b2
b1
b0
Symbol
TA0MR to TA4MR
0 1
Bit Symbol
TMOD0
TMOD1
MR0
Address
0396 16 to 039A 16
Bit Name
Operation mode select bit
Pulse output function
select bit
After Reset
0016
RW
R
W
Function
b1 b0
0 1 : Event counter mode
(1)
RW
RW
0: Pulse is not output
(TA iOUT pin functions as I/O port)
1: Pulse is output
RW
(TAi OUT pin functions as pulse output pin)
MR1
Count polarityselect bit (2)
0: Counts external signal's falling edge
1: Counts external signal's rising edge
RW
MR2
Up/down switching
cause select bit
0: UDF register
1: Input signal to TAiOUT pin(3)
RW
MR3
Set to 0 in event counter mode
RW
TCK0
Count operation type
select bit
RW
TCK1
Can be 0 or 1 when not using two-phase pulse signal processing
0: Reload type
1: Free-run type
RW
NOTES:
1. During event counter mode, the count source can be selected using registers ONSF and TRGSR.
2. Effective when bits TAiTGH and TAiTGL in the ONSF or TRGSR register are 002 (TAiIN pin input).
3. Decrement when input on TAiOUT pin is low or increment when input on that pin is high. The port
direction bit for TAiOUT pin must be set to 0 (input mode).
Figure 12.8 TAiMR Register in Event Counter Mode (when not using two-phase pulse signal
processing)
Rev. 1.12 Mar.30, 2007
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12. Timer A
M16C/29 Group
Table 12.3 Specifications in Event Counter Mode
(when processing two-phase pulse signal with timers A2, A3 and A4)
Item
Count source
Count operation
Divide ratio
Count start condition
Count stop condition
Interrupt request generation timing
TAiIN pin function
TAiOUT pin function
Read from timer
Write to timer
Select function (Note)
Specification
• Two-phase pulse signals input to TAiIN or TAiOUT pins (i = 2 to 4)
• Increment or down-count can be selected by two-phase pulse signal
• When the timer overflows or underflows, it reloads the reload register contents and continues counting. When operating in free-running mode, the
timer continues counting without reloading.
1/ (FFFF16 - n + 1) for increment
1/ (n + 1) for down-count
n : set value of TAi register 000016 to FFFF16
Set TAiS bit in the TABSR register to 1 (start counting)
Set TAiS bit to 0 (stop counting)
Timer overflow or underflow
Two-phase pulse input
Two-phase pulse input
Count value can be read by reading timer A2, A3 or A4 register
• When not counting and until the 1st count source is input after counting start
Value written to TAi register is written to both reload register and counter
• When counting (after 1st count source input)
Value written to TAi register is written to reload register
(Transferred to counter when reloaded next)
• Normal processing operation (timer A2 and timer A3)
The timer counts up rising edges or counts down falling edges on TAjIN pin
when input signals on TAjOUT pin is “H”.
TAjOUT
TAjIN
(j=2,3)
Increment
Increment
Increment Decrement
Decrement
Decrement
• Multiply-by-4 processing operation (timer A3 and timer A4)
If the phase relationship is such that TAkIN(k=3, 4) pin goes “H” when the
input signal on TAkOUT pin is “H”, the timer counts up rising and falling
edges on TAkOUT and TAkIN pins. If the phase relationship is such that
TAkIN pin goes “L” when the input signal on TAkOUT pin is “H”, the timer
counts down rising and falling edges on TAkOUT and TAkIN pins.
TAkOUT
Increment all edges
Decrement all edges
TAkIN
(k=3,4)
Increment all edges
Decrement all edges
• Counter initialization by Z-phase input (timer A3)
The timer count value is initialized to 0 by Z-phase input.
NOTE:
1. Only timer A3 is selectable. Timer A2 is fixed to normal processing operation, and timer A4 is fixed to
multiply-by-4 processing operation.
Rev. 1.12 Mar.30, 2007
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page 109 of 458
12. Timer A
M16C/29 Group
Timer Ai Mode Register (i=2 to 4)
(When using two-phase pulse signal processing)
b6
b5
b4
b3
b2
b1
b0
0 1 0 0 0 1
Symbol
TA2MR to TA4MR
Bit Symbol
TMOD0
TMOD1
Address
0398 16 to 039A 16
Bit Name
Operation mode select bit
After Reset
0016
Function
b1 b0
0 1: Event counter mode
RW
RW
RW
MR0
To use two-phase pulse signal processing, set this bit to 0
RW
MR1
To use two-phase pulse signal processing, set this bit to 0
RW
MR2
To use two-phase pulse signal processing, set this bit to 1
RW
MR3
To use two-phase pulse signal processing, set this bit to 0
RW
TCK0
Count operation type
select bit
0: Reload type
1: Free-run type
RW
TCK1
Two-phase pulse signal
processing operation
select bit (1)(2)
0: Normal processing operation
1: Multiply-by-4 processing operation
RW
NOTES:
1. The TCK1 bit is valid for timer A3 mode register. No matter how this bit is set, timers A2 and A4 always operate
in normal processing mode and x4 processing mode, respectively.
2. If two-phase pulse signal processing is desired, following register settings are required:
• Set the TAiP bit in the UDF register to 1 (two-phase pulse signal processing function enabled).
• Set bits TAiTGH and TAiTGL in the TRGSR register to 002 (TAiIN pin input).
• Set the port direction bits for TAiIN and TAiOUT to 0 (input mode).
Figure 12.9 TA2MR to TA4MR Registers in Event Counter Mode (when using two-phase pulse
signal processing with timer A2, A3 or A4)
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12. Timer A
M16C/29 Group
12.1.2.1 Counter Initialization by Two-Phase Pulse Signal Processing
This function initializes the timer count value to 0 by Z-phase (counter initialization) input during twophase pulse signal processing.
This function can only be used in timer A3 event counter mode during two-phase pulse signal process_______
ing, free-running type, x4 processing, with Z-phase entered from the INT2 pin.
Counter initialization by Z-phase input is enabled by writing 000016 to the TA3 register and setting the
TAZIE bit in ONSF register to 1 (Z-phase input enabled).
Counter initialization is accomplished by detecting Z-phase input edge. The active edge can be chosen to be the rising or falling edge by using the POL bit in the INT2IC register. The Z-phase pulse
_______
width applied to the INT2 pin must be equal to or greater than one clock cycle of the timer A3 count
source.
The counter is initialized at the next count timing after recognizing Z-phase input. Figure 12.10 shows
the relationship between the two-phase pulse (A phase and B phase) and the Z phase.
If timer A3 overflow or underflow coincides with the counter initialization by Z-phase input, a timer A3
interrupt request is generated twice in succession. Do not use the timer A3 interrupt when using this
function.
TA3 OUT
(A phase)
TA3 IN
(B phase)
Count source
INT2 (1)
(Z phase)
Input equal to or greater than one clock cycle
of count source
Timer A3
m
m+1
1
2
3
4
5
NOTE:
1. This timing diagram is for the case where the POL bit in the INT2IC register is set to 1 (rising edge).
Figure 12.10 Two-phase Pulse (A phase and B phase) and the Z Phase
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12. Timer A
M16C/29 Group
12.1.3 One-shot Timer Mode
In one-shot timer mode, the timer is activated only once by one trigger. (See Table 12.4) When the
trigger occurs, the timer starts up and continues operating for a given period. Figure 12.11 shows the
TAiMR register in one-shot timer mode.
Table 12.4 Specifications in One-shot Timer Mode
Item
Count source
Count operation
Divide ratio
Count start condition
Count stop condition
Interrupt request generation timing
TAiIN pin function
TAiOUT pin function
Read from timer
Write to timer
Select function
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
Specification
f1, f2, f8, f32, fC32
• Decrement
• When the counter reaches 000016, it stops counting after reloading a new value
• If a trigger occurs when counting, the timer reloads a new count and restarts counting
1/n
n : set value of TAi register 000016 to FFFF16
However, the counter does not work if the divide-by-n value is set to 000016.
TAiS bit in the TABSR register is set to 1 (start counting) and one of the
following triggers occurs.
• External trigger input from the TAiIN pin
• Timer B2 overflow or underflow,
timer Aj (j=i-1, except j=4 if i=0) overflow or underflow,
timer Ak (k=i+1, except k=0 if i=4) overflow or underflow
• The TAiOS bit in the ONSF register is set to 1 (timer starts)
• When the counter is reloaded after reaching 000016
• TAiS bit is set to 0 (stop counting)
When the counter reaches 000016
I/O port or trigger input
I/O port or pulse output
An undefined value is read by reading TAi register
• When not counting and until the 1st count source is input after counting start
Value written to TAi register is written to both reload register and counter
• When counting (after 1st count source input)
Value written to TAi register is written to only reload register
(Transferred to counter when reloaded next)
• Pulse output function
The timer outputs a low when not counting and a high when counting.
page 112 of 458
12. Timer A
M16C/29 Group
Timer Ai Mode Register (i=0 to 4)
b7
b6
b5
b4
b3
0
b2
b1
b0
1 0
Symbol
TA0MR to TA4MR
Bit Symbol
TMOD0
TMOD1
Address
After Reset
396 16 to 039A 16 0016
Bit Name
Operation mode select bit
Function
b1 b0
1 0: One-shot timer mode
RW
RW
MR0
Pulse output function
select bit
0: Pulse is not output (TAiOUT pin functions
as I/O port)
1: Pulse is output (TAiOUT pin functions as a
pulse output pin)
MR1
External trigger select bit (1)
0: Falling edge of input signal to TAiIN pin (2)
1: Rising edge of input signal to TAiIN pin (2)
RW
MR2
Trigger select bit
0: TAiOS bit is enabled
1: Selected by bits TAiTGH to TAiTGL
RW
MR3
Set to 0 in one-shot timer mode
b7 b6
TCK0
Count source select bit
TCK1
0 0: f1 or f2
0 1: f8
1 0: f32
1 1: fC32
NOTES:
1. Effective when bits TAiTGH and TAiTGL in the ONSF or TRGSR register are 002 (TAiIN pin input).
2. The port direction bit for the TAiIN pin must be set to 0 (input mode).
Figure 12.11 TAiMR Register in One-shot Timer Mode
Rev. 1.12 Mar.30, 2007
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RW
page 113 of 458
RW
RW
RW
RW
12. Timer A
M16C/29 Group
12.1.4 Pulse Width Modulation (PWM) Mode
In PWM mode, the timer outputs pulses of a given width in succession (see Table 12.5). The counter
functions as either 16-bit pulse width modulator or 8-bit pulse width modulator. Figure 12.12 shows
TAiMR register in pulse width modulation mode. Figures 12.13 and 12.14 show examples of how a 16bit pulse width modulator operates and how an 8-bit pulse width modulator operates.
Table 12.5 Specifications in Pulse Width Modulation Mode
Item
Count source
Count operation
Specification
16-bit PWM
8-bit PWM
Count start condition
Count stop condition
Interrupt request generation timing
TAiIN pin function
TAiOUT pin function
Read from timer
Write to timer
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
f1, f2, f8, f32, fC32
• Decrement (operating as an 8-bit or a 16-bit pulse width modulator)
• The timer reloads a new value at a rising edge of PWM pulse and continues counting
• The timer is not affected by a trigger that occurs during counting
• High level width
n / fj
n : set value of TAi register (i=o to 4)
16
• Cycle time (2 -1) / fj fixed
fj: count source frequency (f1, f2, f8, f32, fC32)
• High level width n x (m+1) / fj n : set value of TAi register high-order address
• Cycle time (28-1) x (m+1) / fj m : set value of TAi register low-order address
• TAiS bit in the TABSR register is set to 1 (= start counting)
• The TAiS bit = 1 and external trigger input from the TAiIN pin
• The TAiS bit = 1 and one of the following external triggers occurs
• Timer B2 overflow or underflow,
timer Aj (j=i-1, except j=4 if i=0) overflow or underflow,
timer Ak (k=i+1, except k=0 if i=4) overflow or underflow
TAiS bit is set to 0 (stop counting)
PWM pulse goes “L”
I/O port or trigger input
Pulse output
An undefined value is read by reading TAi register
• When not counting and until the 1st count source is input after counting start
Value written to TAi register is written to both reload register and counter
• When counting (after 1st count source input)
Value written to TAi register is written to only reload register
(Transferred to counter when reloaded next)
page 114 of 458
12. Timer A
M16C/29 Group
Timer Ai Mode Register (i= 0 to 4)
b7
b6
b5
b4
b3
b2
b1
b0
1
1
Symbol
TA0MR to TA4MR
Bit Symbol
TMOD0
TMOD1
Address
039616 to 039A 16
After Reset
0016
Bit Name
Operation mode select bit
Function
b1 b0
1 1: PWM mode
RW
MR0
Pulse output funcion
select bit
0: Pulse is not output (TAiOUT pin functions as I/O
port)
1: Pulse is output (TAiOUT pin functions as a pulse
output pin)
RW
MR1
External trigger select bit (1)
0: Falling edge of input signal to TAiIN pin(2)
1: Rising edge of input signal to TAiIN pin(2)
RW
MR2
Trigger select bit
0: Write 1 to TAiS bit in the TASF register
1: Selected by bits TAiTGH to TAiTGL
RW
MR3
16/8-bit PWM mode
select bit
0: Functions as a 16-bit pulse width modulator
1: Functions as an 8-bit pulse width modulator
RW
b7 b6
TCK0
TCK1
Count source select bit
0 0: f1 or f2
0 1: f8
1 0: f32
1 1: fC32
NOTES:
1. Effective when bits TAiTGH and TAiTGL in the ONSF or TRGSR register are 002 (TAiIN pin input).
2. The port direction bit for the TAiIN pin must be set to 0 ( input mode).
Figure 12.12 TAiMR Register in Pulse Width Modulation Mode
Rev. 1.12 Mar.30, 2007
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RW
page 115 of 458
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RW
12. Timer A
M16C/29 Group
1 / f i X (2 16 – 1)
Count source
Input signal to
TAiIN pin
“H”
PWM pulse output
from TA iOUT pin
“H”
“L”
Trigger is not generated by this signal
1 / fj X n
“L”
1
IR bit in the
TAiIC register
0
fj : Frequency of count source
(f1, f 2, f8, f 32, fC32)
i = 0 to 4
Set to 0 upon accepting an interrupt request or by program
NOTES:
1. n = 0000 16 to FFFE 16.
2. This timing diagram is for the case where the TAi register is 0003 16, bits TAiTGH and TAiTGL in the ONSF or
TRGSR register is set to 00 2 (TAiIN pin input), the MR1 bit in the TAiMR register is set to 1 (rising edge), and
the MR2 bit in the TAiMR register is set to 1 (trigger selected by TAiTGH and TAiTGL bits).
Figure 12.13 Example of 16-bit Pulse Width Modulator Operation
8
1 / fj X (m + 1) X (2 – 1)
Count source
(1)
Input signal to
TAiIN pin
“H”
Underflow signal of
8-bit prescaler (2)
“H”
“L”
1 / f j X (m + 1)
“L”
1 / f j X (m + 1) X n
PWM pulse output
from TA iOUT pin
“H”
IR bit in the
TAiIC register
1
“L”
0
fj : Frequency of count source
(f1, f 2, f8, f 32, fC32)
i = 0 to 4
Set to 0 upon accepting an interrupt request or by program
NOTES:
1. The 8-bit prescaler counts the count source.
2. The 8-bit pulse width modulator counts the 8-bit prescaler's underflow signal.
3. m = 0016 to FF16; n = 0016 to FE16.
4. This timing diagram is for the case where the TAi register is 020216, bits TAiTGH and TAiTGL in the ONSF or
TRGSR register is set to 002 (TAiIN pin input), the MR1 bit in the TAiMR register is set to 0 (falling edge), and the
MR2 bit in the TAiMR register is set to 1 (trigger selected by bits TAiTGH and TAiTGL).
Figure 12.14 Example of 8-bit Pulse Width Modulator Operation
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12. Timer B
M16C/29 Group
12.2 Timer B
Figure 12.15 shows a block diagram of the timer B. Figures 12.16 and 12.17 show registers related to the
timer B.
Timer B supports the following four modes. Use bits TMOD1 and TMOD0 in the TBiMR register (i = 0 to 2)
to select the desired mode.
• Timer mode: The timer counts the internal count source.
• Event counter mode: The timer counts the external pulses or overflows and underflows of other timers.
• Pulse period/pulse width measurement mode: The timer measures the pulse period or pulse width of
external signal.
• A/D trigger mode: The timer starts counting by one trigger until the count value becomes 000016.
This mode is used together with simultaneous sample sweep mode or delayed trigger mode 0 of A/D
converter to start A/D conversion.
Data bus high-order bits
Data bus low-order bits
Clock source selection
High-order 8 bits
Low-order 8 bits
• Timer mode
• Pulse period/, pulse width measuring mode
• A/D trigger mode
f1 or f2
f8
Reload register
Clock selection
f32
• Event counter
fC32
Counter
Polarity switching,
edge pulse
TBiIN
(i = 0 to 2)
TABSR register
Counter reset circuit
Can be selected in
onlyevent counter mode
TBi
Timer B0
Timer B1
Timer B2
TBj overflow (1)
(j = i – 1, except j = 2 if i = 0)
Address
039116 - 039016
039316 - 039216
039516 - 039416
TBj
Timer B2
Timer B0
Timer B1
NOTE:
1. Overflow or underflow.
Figure 12.15 Timer B Block Diagram
Timer Bi Mode Register (i=0 to 2)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
TB0MR to TB2MR
Bit Symbol
TMOD0
Address
039B16 to 039D16
Function
RW
0 0 : Timer mode or A/D trigger mode
0 1 : Event counter mode
1 0 : Pulse period measurement mode,
pulse width measurement mode
1 1 : Do not set
RW
Bit Name
Operation mode select bit
TMOD1
MR0
After Reset
00XX00002
b1 b0
Function varies with each operation
mode
MR1
MR2
TCK1
(2)
Count source select bit
NOTES:
1. Timer B0.
2. Timer B1, Timer B2.
Figure 12.16 TB0MR to TB2MR Registers
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 117 of 458
RW
RW
RW(1)
RO
MR3
TCK0
RW
Function varies with each operation
mode
RW
RW
12. Timer B
M16C/29 Group
Timer Bi Register (i=0 to 2)(1)
(b15)
b7
(
b8)
b0 b7
b0
Symbol
TB0
TB1
TB2
Address
039116, 039016
039316, 039216
039516, 039416
Setting Rrange
Function
Mode
After Reset
Undefined
Undefined
Undefined
Timer mode
Divide the count source by n + 1
where n = set value
0000 16 to FFFF 16
Event counter
mode
Divide the count source by n + 1
where n = set value (2)
0000 16 to FFFF 16
Pulse period
Measures a pulse period or width
modulation mode,
Pulse width
modulation mode
A/D trigger
Divide the count source by n + 1 where
n = set value and cause the timer stop
mode (3)
RW
RW
RW
RO
0000 16 to FFFF 16 RW
NOTES:
1.The register must be accessed in 16 bit units.
2. The timer counts pulses from an external device or overflows or underflows of other timers.
3. When this mode is used combining delayed trigger mode 0, set the larger value than the
value in the timer B0 register to the timer B1 register.
Count Start Flag
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
TABSR
Bit Symbol
Address
038016
After Reset
0016
Bit Name
Function
RW
TA0S
Timer A0 count start flag
TA1S
Timer A1 count start flag
TA2S
Timer A2 count start flag
RW
TA3S
Timer A3 count start flag
RW
TA4S
Timer A4 count start flag
RW
TB0S
Timer B0 count start flag
RW
TB1S
Timer B1 count start flag
RW
TB2S
Timer B2 count start flag
RW
0: Stops counting
1: Starts counting
RW
RW
Clock Prescaler Reset flag
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
CPSRF
Bit Symbol
Address
038116
Bit Name
After Reset
0XXXXXXX16
Function
(b6-b0)
Nothing is assigned. If necessary, set to 0. When read, the
contents are undefined
CPSR
Clock prescaler reset flag Setting this bit to 1 initializes the
prescaler for the timekeeping clock.
(When read, the value of this bit is 0)
Figure 12.17 TB0 to TB2 Registers, TABSR Register, CPSRF Register
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 118 of 458
RW
RW
12. Timer B
M16C/29 Group
12.2.1 Timer Mode
In timer mode, the timer counts a count source generated internally (see Table 12.6). Figure 12.18
shows TBiMR register in timer mode.
Table 12.6 Specifications in Timer Mode
Item
Count source
Count operation
Specification
Divide ratio
Count start condition
Count stop condition
Interrupt request generation timing
TBiIN pin function
Read from timer
Write to timer
f1, f2, f8, f32, fC32
• Decrement
• When the timer underflows, it reloads the reload register contents and
continues counting
1/(n+1) n: set value of TBi register (i= 0 to 2)
000016 to FFFF16
Set TBiS bit(1) to 1 (start counting)
Set TBiS bit to 0 (stop counting)
Timer underflow
I/O port
Count value can be read by reading TBi register
• When not counting and until the 1st count source is input after counting start
Value written to TBi register is written to both reload register and counter
• When counting (after 1st count source input)
Value written to TBi register is written to only reload register
(Transferred to counter when reloaded next)
NOTE:
1. Bits TB0S to TB2S are assigned to the bit 7 to bit 5 in the TABSR register.
Timer Bi Mode Register (i= 0 to 2)
b7
AA
b6
b5
b4
b3
b2
b1
b0
0 0
Symbol
TB0MR to TB2MR
Bit Symbol
TMOD0
Address
039B16 to 039D16
Bit Name
Operation mode select bit
TMOD1
MR0
MR1
MR2
MR3
TCK0
0 0: Timer mode or A/D trigger mode
RW
RW
RW
RW
RW
TB0MR register
Set to 0 in timer mode
RW
TB1MR, TB2MR registers
Nothing is assigned. If necessary, set to 0. When read, its
content is undefined
When write in timer mode, set to 0. When read in timer mode, its
content is undefined
Count source select bit
Figure 12.18 TBiMR Register in Timer Mode
page 119 of 458
Function
b1 b0
No effect in timer mode
Can be set to 0 or 1
TCK1
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REJ09B0101-0112
After Reset
00XX00002
b7 b6
0 0: f1 or f2
0 1: f8
1 0: f32
1 1: fC32
RO
RW
RW
12. Timer B
M16C/29 Group
12.2.2 Event Counter Mode
In event counter mode, the timer counts pulses from an external device or overflows and underflows of
other timers (see Table 12.7). Figure 12.19 shows the TBiMR register in event counter mode.
Table 12.7 Specifications in Event Counter Mode
Item
Count source
Specification
• External signals input to TBiIN pin (i=0 to 2) (effective edge can be selected
in program)
• Timer Bj overflow or underflow (j=i-1, except j=2 if i=0)
Count operation
• Decrement
• When the timer underflows, it reloads the reload register contents and
continues counting
Divide ratio
1/(n+1)
n: set value of TBi register
000016 to FFFF16
Count start condition
Set TBiS bit(1) to 1 (start counting)
Count stop condition
Set TBiS bit to 0 (stop counting)
Interrupt request generation timing Timer underflow
TBiIN pin function
Count source input
Read from timer
Count value can be read by reading TBi register
Write to timer
• When not counting and until the 1st count source is input after counting start
Value written to TBi register is written to both reload register and counter
• When counting (after 1st count source input)
Value written to TBi register is written to only reload register
(Transferred to counter when reloaded next)
NOTE:
1. Bits TB2S to TB0S are assigned to the bit 7 to bit 5 in the TABSR register.
Timer Bi Mode Register (i=0 to 2)
b7
b6
b5
A
b4
b3
b2
b1
b0
0 1
Symbol
TB0MR to TB2MR
Bit Symbol
TMOD0
Address
039B16 to 039D16
Bit Name
Operation mode select bit
TMOD1
MR0
Count polarity select
bit (1)
MR1
After Reset
00XX00002
Function
b1 b0
0 1: Event counter mode
RW
b3 b2
0 0: Counts external signal's
falling edges
0 1: Counts external signal's rising
edges
1 0: Counts external signal's
falling and rising edges
1 1: Do not set
TB0MR register
Set to 0 in timer mode
RW
RW
RW
MR2
TB1MR, TB2MR registers
Nothing is assigned. If necessary, set to 0. When read, the
content is undefined
MR3
When write in event counter mode, set to 0. When read in event
counter mode, its content is undefined
RO
TCK0
No effect in event counter mode
Can be set to 0 or 1
RW
TCK1
Event clock select
0 : Input from TBiIN pin (2)
1 : TBj overflow or underflow
(j = i – 1, except j = 2 if i = 0)
NOTES:
1. Effective when the TCK1 bit is set to 0 (input from TBiIN pin). If the TCK1 bit is set to 1 (TBj overflow or
underflow), these bits can be set to 0 or 1.
2. The port direction bit for the TBiIN pin must be set to 0 (= input mode).
Figure 12.19 TBiMR Register in Event Counter Mode
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
RW
RW
page 120 of 458
RW
12. Timer B
M16C/29 Group
12.2.3 Pulse Period and Pulse Width Measurement Mode
In pulse period and pulse width measurement mode, the timer measures pulse period or pulse width of an
external signal (see Table 12.8). Figure 12.20 shows the TBiMR register in pulse period and pulse width
measurement mode. Figure 12.21 shows the operation timing when measuring a pulse period. Figure
12.22 shows the operation timing when measuring a pulse width.
Table 12.8 Specifications in Pulse Period and Pulse Width Measurement Mode
Item
Count source
Count operation
Specification
f1, f2, f8, f32, fC32
• Increment
• Counter value is transferred to reload register at an effective edge of measurement pulse. The counter value is set to 000016 to continue counting.
Count start condition
Set TBiS (i=0 to 2) bit (3) to 1 (start counting)
Count stop condition
Set TBiS bit to 0 (stop counting)
Interrupt request generation timing • When an effective edge of measurement pulse is input (1)
• Timer overflow. When an overflow occurs, MR3 bit in the TBiMR register is set to
1 (overflowed) simultaneously. MR3 bit is cleared to 0 (no overflow) by writing
to TBiMR register at the next count timing or later after MR3 bit was set to 1. At
this time, make sure TBiS bit is set to 1 (start counting).
TBiIN pin function
Measurement pulse input
Read from timer
Contents of the reload register (measurement result) can be read by reading TBi register (2)
Write to timer
Value written to TBi register is written to neither reload register nor counter
NOTES:
1. Interrupt request is not generated when the first effective edge is input after the timer started counting.
2. Value read from TBi register is undefined until the second valid edge is input after the timer starts counting.
3. Bits TB0S to TB2S are assigned to the bit 5 to bit 7 in the TABSR register .
Timer Bi Mode Register (i=0 to 2)
b7
b6
b5
b4
b3
b2
b1
b0
1 0
Symbol
TB0MR to TB2MR
Bit Symbol
TMOD0
TMOD1
MR0
Address
039B16 to 039D16
Bit Name
Operation mode
select bit
Measurement mode
select bit
MR1
After Reset
00XX00002
Function
b1 b0
1 0 : Pulse period / pulse width
measurement mode
RW
RW
RW
b3 b2
0 0: Pulse period measurement
(Measurement between a falling edge and the
next falling edge of measured pulse)
0 1: Pulse period measurement
(Measurement between a rising edge and the next
rising edge of measured pulse)
1 0: Pulse width measurement
(Measurement between a falling edge and the
next rising edge of measured pulse and between
a rising edge and the next falling edge)
1 1: Do not set.
RW
RW
MR2
TB0MR register
RW
Set to 0 in pulse period and pulse width measurement mode
TB1MR, TB2MR registers
Nothing is assigned. If necessary, set to 0. When read, its content is undefined
MR3
Timer Bi overflow
flag (1)
0 : Timer did not overflow
1 : Timer has overflowed
TCK0
Count source
select bit
b7 b6
TCK1
0 0: f1 or f2
0 1: f8
1 0: f32
1 1: fC32
RO
RW
RW
NOTE:
1.This flag is undefined after reset. When the TBiS bit is set to 1 (start counting), the MR3 bit is cleared to 0 (no overflow) by
writing to the TBiMR register at the next count timing or later after the MR3 bit was set to 1 (overflowed). The MR3 bit cannot be
set to 1 by program. Bits TB0S to TB2S are assigned to the bit 5 to bit 7 in the TABSR register.
Figure 12.20 TBiMR Register in Pulse Period and Pulse Width Measurement Mode
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12. Timer B
M16C/29 Group
Count source
“H”
Measurement pulse
Reload register
transfer timing
“L”
Transfer
(undefined value)
Transfer
(measured value)
counter
(1)
(1)
(2)
Timing at which counter
reaches 000016
1
TBiS bit
0
TBiIC register's
IR bit
1
TBiMR register's
MR3 bit
1
0
Set to 0 upon accepting an interrupt request or by program
0
Bits TB0S to TB2S are assigned to the bit 5 to bit 7 in the TABSR register.
i = 0 to 2
NOTES:
1. Counter is initialized at completion of measurement.
2. Timer has overflowed.
3. This timing diagram is for the case where bits MR1 and MR0 in the TBiMR register are 002 (measure the
interval from falling edge to falling edge of the measurement pulse).
Figure 12.21 Operation timing when measuring a pulse period
Count source
“H”
Measurement pulse
Reload register
transfer timing
“L”
counter
Transfer
(undefined
value)
(1)
Transfer
(measured value)
Transfer
(measured
value)
(1)
(1)
Transfer
(measured value)
(1)
(1)
Timing at which counter
reaches 000016
1
TBiS bit
0
1
TBiIC register's
IR bit
0
The MR3 bit in the
TBiMR register
1
Set to 0 upon accepting an interrupt request or by
program
0
Bits TB0S to TB2S are assigned to the bit 5 to bit 7 in the TABSR register.
i = 0 to 2
NOTES:
1. Counter is initialized at completion of measurement.
2. Timer has overflowed.
3. This timing diagram is for the case where bits MR1 to MR0 in the TBiMR register are 102 (measure the interval
from a falling edge to the next rising edge and the interval from a rising edge to the next falling edge of the
measurement pulse).
Figure 12.22 Operation timing when measuring a pulse width
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12. Timer B
M16C/29 Group
12.2.4 A/D Trigger Mode
A/D trigger mode is used together with simultaneous sample sweep mode or delayed trigger mode 0 of
A/D conversion to start A/D conversion. It is used in timer B0 and timer B1 only. In this mode, the timer
starts counting by one trigger until the count value becomes 000016. Figure 12.23 shows the TBiMR
register in A/D trigger mode and Figure 12.24 shows the TB2SC register.
Table 12.9 Specifications in A/D Trigger Mode
Item
Specification
Count Source
f1, f2, f8, f32, and fC32
Count Operation
• Decrement
• When the timer underflows, reload register contents are reloaded before
stopping counting
• When a trigger is generated during the count operation, the count is not
affected
Divide Ratio
1/(n+1) n: Setting value of TBi register (i=0,1)
000016-FFFF16
Count Start Condition
When the TBiS (i=0,1) bit in the TABSR register is 1(count started),
TBiEN(i=0,1) in TB2SC register is 1 (A/D trigger mode) and the following
trigger is generated.(Selection based on bits TB2SEL in the TB2SC)
• Timer B2 interrupt
• Underflow of Timer B2 interrupt generation frequency counter setting
Count Stop Condition
• After the count value is 000016 and reload register contents are reloaded
• Set the TBiS bit to 0 (count stopped)
Interrupt Request
Timer underflows (1)
Generation Timing
TBiIN Pin Function
I/O port
Read From Timer
Count value can be read by reading TBi register
Write To Timer (2)
• When writing in the TBi register during count stopped.
Value is written to both reload register and counter
• When writing in the TBi register during count.
Value is written to only reload register (Transfered to counter when reloaded next)
NOTES:
1: A/D conversion is started by the timer underflow. For details refer to 15. A/D Converter.
2: When using in delayed trigger mode 0, set the larger value than the value of the timer B0 register
to the timer B1 register.
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12. Timer B
M16C/29 Group
AA
A
AA
A
Timer Bi Mode Register (i= 0 to 1)
b7
b6
b5
b4
b3
b2
b1
b0
0 0
Symbol
TB0MR to TB1MR
Bit Symbol
TMOD0
Address
039B16 to 039C16
Function
Bit Name
Operation mode select bit
TMOD1
MR0
After Reset
00XX00002
b1 b0
0 0: Timer mode or A/D trigger mode
Invalid in A/D trigger mode
Either 0 or 1 is enabled
MR1
RW
RW
RW
TB0MR register
Set to 0 in A/D trigger mode
MR2
RW
RW
RW
TB1MR register
Nothing is assigned. If necessary, set to 0. When read, its
content is undefined
MR3
When write in A/D trigger mode, set to 0. When read in A/D trigger
mode, its content is undefined
TCK0
Count source select bit
TCK1
(1)
b7 b6
0 0: f1 or f2
0 1: f8
1 0: f32
1 1: fC32
RO
RW
RW
NOTE:
1. When this bit is used in delayed trigger mode 0, set the same count source to the timer B0 and timer B1.
Figure 12.23 TBiMR Register in A/D Trigger Mode
Timer B2 special mode register (1)
b7
b6
b5
b4
0 0
b3
b2
1 1
b1
b0
Symbol
TB2SC
Bit Symbol
After Reset
X00000002
Address
039E16
Bit Name
Function
PWCON
Timer B2 reload timing
switch bit (2)
0: Timer B2 underflow
1: Timer A output at odd-numbered
IVPCR1
Three-phase output port
SD control bit 1
TB0EN
Timer B0 operation mode
select bit
0: Three-phase output forcible cutoff
by SD pin input (high impedance)
disabled
1: Three-phase output forcible cutoff
by SD pin input (high impedance)
enabled
0: Other than A/D trigger mode
(5)
1: A/D trigger mode
TB1EN
Timer B1 operation mode
select bit
0: Other than A/D trigger mode
(5)
1: A/D trigger mode
(3, 4, 7)
TB2SEL
Trigger select bit
(b6-b5)
Reserved bits
(b7)
(6)
RW
RW
RW
RW
RW
0: TB2 interrupt
RW
1: Underflow of TB2 interrupt
generation frequency setting counter [ICTB2]
Set to 0
RW
Nothing is assigned. If necessary, set to 0.
When read, its content is 0
NOTES:
1. Write to this register after setting the PRC1 bit in the PRCR register to 1 (write enabled).
2. If the INV11 bit is 0 (three-phase mode 0) or the INV06 bit is 1 (triangular wave modulation mode), set this bit to 0 (timer
B2 underflow).
3. When setting the IVPCR1 bit to 1 (three-phase output forcible cutoff by SD pin input enabled), Set the PD85 bit to 0 (= input
mode).
4. Related pins are U(P80), U(P81), V(P72), V(P73), W(P74), W(P75). When a high-level ("H") signal is applied to the SD pin
and set the IVPCR1 bit to 0 after forcible cutoff, pins U, U, V, V, W, and W are exit from the high-impedance state. If a lowlevel (“L”) signal is applied to the SD pin, three-phase motor control timer output will be disabled (INV03=0). At this time,
when the IVPCR1 bit is 0, pins U, U, V, V, W, and W become programmable I/O ports. When the IVPCR1 bit is set to 1,
pins U, U, V, V, W, and W are placed in a high-impedance state regardless of which function of those pins is used.
5. When this bit is used in delayed trigger mode 0, set bits TB0EN and TB1EN to 1 (A/D trigger mode).
6. When setting the TB2SEL bit to 1 (underflow of TB2 interrupt generation frequency setting counter[ICTB2]), set the INV02
bit to 1 (three-phase motor control timer function).
Figure 12.24 TB2SC Register in A/D Trigger Mode
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12. Timer (Three-phase Motor Control Timer Function)
M16C/29 Group
12.3 Three-phase Motor Control Timer Function
Timers A1, A2, A4 and B2 can be used to output three-phase motor drive waveforms. Table 12.10 lists the
specifications of the three-phase motor control timer function. Figure 12.24 shows the block diagram for
three-phase motor control timer function. Also, the related registers are shown on Figures 12.26 to 12.32.
Table 12.10 Three-phase Motor Control Timer Function Specifications
Item
Specification
___
___
___
Three-phase waveform output pin
Six pins (U, U, V, V, W, W)
_____
Forced cutoff input (1)
Input “L” to SD pin
Used Timers
Timer A4, A1, A2 (used
in the one-shot timer mode)
___
Timer A4: U- and ___
U-phase waveform control
Timer A1: V- and V-phase
waveform control
___
Timer A2: W- and W-phase waveform control
Timer B2 (used in the timer mode)
Carrier wave cycle control
Dead time timer (3 eight-bit timer and shared reload register)
Dead time control
Output waveform
Triangular wave modulation, Sawtooth wave modification
Enable to output “H” or “L” for one cycle
Enable to set positive-phase level and negative-phase
level respectively
Carrier wave cycle
Triangular wave modulation: count source x (m+1) x 2
Sawtooth wave modulation: count source x (m+1)
m: Setting value of TB2 register, 0 to 65535
Count source: f1, f2, f8, f32, fC32
Three-phase PWM output width
Triangular wave modulation: count source x n x 2
Sawtooth wave modulation: count source x n
n: Setting value of TA4, TA1 and TA2 register (of TA4,
TA41, TA1, TA11, TA2 and TA21 registers when setting
the INV11 bit to 1), 1 to 65535
Count source: f1, f2, f8, f32, fC32
Dead time
Count source x p, or no dead time
p: Setting value of DTT register, 1 to 255
Count source: f1, f2, f1 divided by 2, f2 divided by 2
Active level
Eable to select “H” or “L”
Positive and negative-phase concurrent
Positive and negative-phases concurrent active disable
function
Positive and negative-phases concurrent active detect function
Interrupt frequency
For Timer B2 interrupt, select a carrier wave cycle-to-cycle
basis through 15 times carrier wave cycle-to-cycle basis
NOTE:
1. When
the INV02 bit in the
INVC0 register is set to 1 (three-phase motor control timer function), the
_____
_____
SD function of the P8
5/SD pin is enabled. At this time, the P85 pin_____
cannot be used as a programmable
_____
I/O port. When the SD function is not used, apply “H” to the P85/SD pin.
_____
When the IVPCR1 bit in the TB2SC_____
register is set to 1 (enable three-phase output forced cutoff by SD
pin input), and “L” is applied to the SD pin, the related pins enter high-impedance state regardless of
the functions
which are used. When the IVPCR1
bit is set to 0 (disabled three-phase output forced
_____
_____
cutoff by SD pin input) and “L” is applied to the SD pin, the related pins can be selected as a programmable I/O port and the setting of the port and port direction
registers are ___
enable.
_________ _________
Related pins:
P72/CLK2/TA1OUT/V/RXD1
P73/CTS2/RTS
2/TA1IN/V/TXD1
____
P74/TA2OUT/W
P75/TA2IN/W
___
P80/TA4OUT/U
P81/TA4IN/U
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T Q
INV11
(One-shot timer mode)
Timer A4 counter
Reload
TA41 register
Figure 12.25 Three-phase Motor Control Timer Functions Block Diagram
T Q
INV11
(One-shot timer mode)
Timer A1 counter
Reload
T Q
INV11
(One-shot timer mode)
Timer A2 counter
Reload
TA21 register
TA11 register
INV06
1/2
1
0
INV06
INV06
Timer A4
one-shot pulse
Transfer trigger
(Note 1)
f1
or f2
INV01
INV11
SD
D
Q
T
W phase output
control circuit
Trigger
Trigger
U phase output signal
Three-phase output
shift register
(U phase)
W phase output signal
W phase output signal
Dead time timer
n = 1 to 255
V phase output
signal
V phase output signal
Dead time timer
n = 1 to 255
DUB0
bit
D
Q
T
V phase output
control circuit
Trigger
Trigger
D Q
T
DUB1
bit
D Q
T
U phase output signal
IVPRC1
Trigger
RESET
INV04
INV05
Data Bus
RESET
SD
S Q
R
Q D
T
INV03
Reverse
control
Reverse
control
Reverse
control
Reverse
control
Reverse
control
Reverse
control
INV14
D Q
R
b2
b1
b0
Q D
T
Q D
T
PD7_5
PD7_4
PD7_3
PD7_2
PD8_1
PD8_0
IDU
IDV
IDW
Diagram for switching to P80, P81 and P72 - P75 is not shown.
D Q
T
D Q
T
T
D Q
T
D Q
T
D Q
D Q
T
Timer B2
interrupt request bit
Trigger
Dead time timer
n = 1 to 255
Reload register
n = 1 to 255
ICTB2 counter
n = 1 to 15
U phase output
control circuit
DU0
DU1
bit
bit
INV12
0
1
Interrupt occurrence set circuit
Bits 2 through 0 of Position-dataretain function control register
(address 034E16)
NOTE:
1. If the INV06 bit is set to 0 (triangular wave modulation mode), a transfer trigger is generated at only the first occurrence of a timer B2 underflow after writing to the IDB0 and IDB1 registers.
Set to 0 when TA2S bit is set to 0
Trigger
TA2 register
Set to 0 when TA1S bit = 0
Trigger
TA1 register
Set to 0 when TA4S bit is set to 0
Trigger
TA4 register
INV07
Timer A4 reload control signal
Timer Ai (i = 1, 2, 4) start trigger signal
(Timer mode)
Timer B2
Signal to be
written to
timer B2
INV10
Timer B2 underflow
INV00
INV13
ICTB2 register
n = 1 to 15
W
W
V
V
U
U
M16C/29 Group
12. Timer (Three-phase Motor Control Timer Function)
12. Timer (Three-phase Motor Control Timer Function)
M16C/29 Group
Three-phase PWM Control Register 0 (1)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
INVC0
Bit Symbol
Address
034816
After Reset
0016
Bit Name
Function
RW
RW
RW
INV00
Effective interrupt output
polarity select bit(3)
0: ICTB2 counter is incremented by 1 on
the rising edge of timer A1 reload control
signal
1: ICTB2 counter is incremented by 1 on
the falling edge of timer A1 reload control
signal
INV01
Effective interrupt output
specification bit(2, 3)
0: ICTB2 counter incremented by 1 at a
timer B2 underflow
1: Selected by INV00 bit
bit(4)
0: Three-phase motor control timer
function unused
1: Three-phase motor control timer
function (5)
0: Three-phase motor control timer output
disabled (5)
1: Three-phase motor control timer output
enabled
RW
INV02
Mode select
INV03
Output control bit(6)
INV04
Positive and negative
phases concurrent output
disable bit
0: Simultaneous active output enabled
1: Simultaneous active output disabled
RW
INV05
Positive and negative
phases concurrent output
detect flag
0: Not detected yet
1: Already detected
RW
INV06
0: Triangular wave modulation mode
Modulation mode select bit(8) 1: Sawtooth wave modulation mode (9)
INV07
Software trigger select bit
(7)
Setting this bit to 1 generates a transfer
trigger. If the INV06 bit is 1, a trigger for the
dead time timer is also generated. The
value of this bit when read is 0
RW
RW
RW
NOTES:
1. Write to this register after setting the PRC1 bit in the PRCR register to 1 (write enable). Note also that bits INV00 to INV02,
bits INV04 and INV06 can only be rewritten when timers A1, A2, A4 and B2 are idle.
2. If this bit needs to be set to 1, set any value in the ICTB2 register before writing to it.
3. Effective when the INV11 bit in the INV1 register is 1 (three-phase mode 1). If INV11 is set to 0 (three-phase mode 0), the
ICTB2 counter is incremented by 1 each time the timer B2 underflows, regardless of whether the INV00 and INV01 bits are
set. When setting the INV01 bit to 1, the first interrupt is generated when the timer B2 underflows n-1 times, if n is the value
set in the ICTB2 counter. Subsequent interrupts are generated every n times the timer B2 underflow.
4. Setting the INV02 bit to 1 activates the dead time timer, U/V/W-phase output control circuits and ICTB2 counter.
5. When the INV02 bit is set to 1 and the INV03 bit is set to 0, U, U, V, V, W, W pins, including pins shared with other output
functions, enter a high-impedance state. When INV03 is set to 1, U/V/W corresponding pins generate the three-phase PWM
output.
6. The INV03 bit is set to 0 in the following cases:
• When reset
• When positive and negative go active (INV05 = 1) simultaneously while INV04 bit is 1
• When set to 0 by program
• When input on the SD pin changes state from “H” to “L” regardless of the value of the INVCR1 bit. (The INV03 bit cannot be
set to 1 when SD input is “L”.) INV03 is set to 0 when both bits INV05 and INV04 are set to 1.
Item
Mode
INV06=0
INV06=1
Sawtooth wave modulation mode
Timing at which transferred from registers
IDB0 to IDB1 to three-phase output shift
register
Triangular wave modulation mode
Transferred only once synchronously
with the transfer trigger after writing to
registers IDB0 to IDB1
Timing at which dead time timer trigger is
generated when INV16 bit is 0
Synchronous with the falling edge of
timer A1, A2, or A4 one-shot pulse
Synchronous with the transfer
trigger and the falling edge of timer
A1, A2, or A4 one-shot pulse
INV13 bit
Effective when INV11 is set to 1 and
INV06 is set to 0
No effect
Transferred every transfer trigger
Transfer trigger: Timer B2 underflow, write to the INV07 bit or write to the TB2 register when the INV10 bit is set to 1.
9: If the INV06 bit is set to 1, set the INV11 bit to 0 (three-phase mode 0) and set the PWCON bit to 0 (timer B2 reloaded by a
timer B2 underflow)
10. When the PFCi (i = 0 to 5) bit in the PFCR register is set to 1 (three-phase PWM output), individual pins are enabled to output.
Figure 12.26 INVC0 Register
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12. Timer (Three-phase Motor Control Timer Function)
M16C/29 Group
Three-phase PWM Control Register 1 (1)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
0
INVC1
Address
After Reset
034916
Bit Symbol
0016
Bit Name
Function
RW
INV10
Timer A1, A2, A4 start
trigger signal select bit
INV11
Timer A1-1, A2-1, A4-1
control bit
INV12
Dead time timer count
source select bit
0: f 1 or f2
1: f 1 divided by 2 or f 2 divided by 2
RW
INV13
Carrier wave detect flag (5)
0: Timer Reload control signal is set to 0
1: Timer Reload control signal is set to 1
RO
INV14
Output polarity control bit
0 : Output waveform “L” active
1 : Output waveform “H” active
RW
INV15
Dead time invalid bit
0: Dead time timer enabled
1: Dead time timer disabled
RW
INV16
Dead time timer trigger
select bit
0: Falling edge of timer A4, A1 or A2
one-shot pulse
1: Rising edge of three-phase output shift
register (U, V or W phase) output(6)
RW
Reserved bit
Set to 0
RW
(b7)
(3)
0: Timer B2 underflow
1: Timer B2 underflow and write to the
TB2 register (2)
RW
0: Three-phase mode 0
1: Three-phase mode 1
RW
(4)
NOTES:
1. Write to this register after setting the PRC1 bit in the PRCR register to 1 (write enable). Note also that this register
can only be rewritten when timers A1, A2, A4 and B2 are idle.
2. A start trigger is generated by writing to the TB2 register only while timer B2 stops.
3. The effects of the INV11 bit are described in the table below.
Item
INV11=1
INV11=0
Mode
Three-phase mode 0
Three-phase mode 1
TA11, TA21, TA41 registers
Not Used
Used
INV00 bit, INV01 bit
Has no effect. ICTB2 counted every time
timer B2 underflows regardless of
whether bits INV00 and INV01 are set
Effect
INV13 bit
Has no effect
Effective when INV11 bit is 1 and
INV06 bit is 0
4. If the INV06 bit is 1 (sawtooth wave modulation mode), set this bit to 0 (three-phase mode 0). Also, if the INV11 bit is
0, set the PWCON bit to 0 (timer B2 reloaded by a timer B2 underflow).
5. The INV13 bit is effective only when the INV06 bit is set to 0 (triangular wave modulation mode) and the INV11 bit is
set to 1 (three-phase mode 1).
6. If all of the following conditions hold true, set the INV16 bit to 1 (dead time timer triggered by the rising edge of threephase output shift register output)
• The INV15 bit is 0 (dead time timer enabled)
• When the INV03 bit is set to 1 (three-phase motor control timer output enabled), the Dij bit and DiBj bit (i:U, V, or
W, j: 0 to 1) have always different values (the positive-phase and negative-phase always output different levels
during the period other than dead time).
Conversely, if either one of the above conditions holds false, set the INV16 bit to 0 (dead time timer triggered by the
falling edge of one-shot pulse).
Figure 12.27 INVC1 Register
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12. Timer (Three-phase Motor Control Timer Function)
M16C/29 Group
Three-phase Output Buffer Register(i=0,1) (1)
b7
b4
b3
b2
b1
b0
0
Symbol
Address
After Reset
IDB0
034A16
001111112
034B16
001111112
IDB1
Bit Symbol
Bit Name
Function
RW
DUi
U phase output buffer i
DUBi
U phase output buffer i
Write the output level
0: Active level
1: Inactive level
DVi
V phase output buffer i
When read, these bits show the three-phase
output shift register value.
DVBi
V phase output buffer i
RW
DWi
W phase output buffer i
RW
DWBi
W phase output buffer i
RW
Nothing is assigned. If necessary, set to 0. When read,
these contents are 0
RO
(b7-b6)
RW
RW
RW
NOTE:
1. Registers IDB0 and IDB1 values are transferred to the three-phase shift register by a transfer trigger. The value
written to the IDB0 register aftera transfer trigger represents the output signal of each phase, and the next value
written to the IDB1 register at the falling edge of the timer A1, A2, or A4 one-shot pulse represents the output signal
of each phase.
Dead Time Timer (1, 2)
b7
Symbol
DTT
b0
Address
034C16
After Reset
Undefined
Function
Setting Range
Assuming the set value = n, upon a start trigger the timer starts
counting the count souce selected by the INV12 bit and stops
after counting it n times. The positive or negative phase
whichever is going from an inactive to an active level changes
at the same time the dead time timer stops.
RW
1 to 255
WO
NOTES:
1. Use MOV instruction to write to this register.
2. Effective when the INV15 bit is set to 0 (dead time timer enable). If the INV15 bit is set to 1, the dead time timer is
disabled and has no effect.
Timer B2 Interrupt Occurrences Frequency Set Counter
b7 b6 b5
b4 b3
b0
Symbol
ICTB2
Address
034D16
After Reset
Undefined
Function
If the INV01 bit is 0 (ICTB2 counter counted every
time timer B2 underflows), assuming the set value
= n, a timer B2 interrupt is generated at every nth
occurrence of a timer B2 underflow.
If the INV01 bit is 1 (ICTB2 counter count timing
selected by the INV00 bit), assuming the set value
= n, a timer B2 interrupt is generated at every nth
occurrence of a timer B2 underflow that meets the
(1)
condition selected by the INV00 bit.
Setting Range
RW
1 to 15
WO
Nothing is assigned. When write, set to "0". When read, the content is
undefined.
NOTE:
1. Use MOV instruction to write to this register.
If the INV01 bit is set to 1, make sure the TB2S bit also is set to 0 (timer B2 count stopped) when writing to
this register. If the INV01 bit is set to 0, although this register can be written even when the TB2S bit is set to
1 (timer B2 count start), do not write synchronously with a timer B2 underflow.
Figure 12.28 IDB0 Register, IDB1Register, DTT Register, and ICTB2 Register
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12. Timer (Three-phase Motor Control Timer Function)
M16C/29 Group
Timer Ai, Ai-1 Register (i=1, 2, 4) (1, 2, 3, 4, 5)
(b15)
b7
(b8)
b0 b7
b0
Symbol
TA1
TA2
TA4
TA11(6,7)
TA21(6,7)
TA41(6,7)
Address
038916-038816
038B16-038A16
038F16-038E16
034316-034216
034516-034416
034716-034616
Function
Assuming the set value = n, upon a start trigger the timer
starts counting the count source and stops after counting
it n times. The positive and negative phases change at
the same time timer A, A2 or A4 stops.
After reset
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Setting Range
RW
000016 to FFFF16
WO
NOTES:
1. The register must be accessed in 16 bit units.
2. When the timer Ai register is set to 000016, the counter does not operate and a timer Ai interrupt does not occur.
3. Use MOV instruction to write to these registers.
4. If the INV15 bit is 0 (dead time timer enable), the positive or negative phase whichever is going from an inactive
to an active level changes at the same time the dead time timer stops.
5. If the INV11 bit is 0 (three-phase mode 0), the TAi register value is transferred to the reload register by
a timer Ai (i = 1, 2 or 4) start trigger.
If the INV11 bit is 1 (three-phase mode 1), the TAi1 register value is transferred to the reload register by a timer Ai
start trigger first and then the TAi register value is transferred to the reload register by the next timer Ai start trigger.
Thereafter, the TAi1 register and TAi register values are transferred to the reload register alternately.
6. Do not write to TAi1 registers synchronously with a timer B2 underflow In three-phase mode 1.
7. Write to the TAi1 register as follows:
(1) Write a value to the TAi1 register
(2) Wait for one cycle of timer Ai count source.
(3) Write the same value to the TAi1 register again.
Figure 12.29 TA1, TA2, TA4, TA11, TA21, and TA41 Registers
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12. Timer (Three-phase Motor Control Timer Function)
M16C/29 Group
Timer B2 Special Mode Register (1)
b7
b6
b5
00
b4
b3
b2
b1
b0
Symbol
TB2SC
Address
039E16
Bit Symbol
After Reset
X00000002
Bit Name
RW
Function
PWCON
Timer B2 reload timing
switch bit (2)
0: Timer B2 underflow
1: Timer A output at odd-numbered
IVPCR1
Three-phase output port
SD control bit 1
0: Three-phase output forcible cutoff by SD pin input
(high impedance) disabled
1: Three-phase output forcible cutoff by SD pin input
(high impedance) enabled
(3, 4, 7)
RW
RW
TB0EN
Timer B0 operation mode 0: Other than A/D trigger mode
select bit
(5)
1: A/D trigger mode
RW
TB1EN
Timer B1 operation mode 0: Other than A/D trigger mode
select bit
1: A/D trigger mode
(5)
RW
TB2SEL
Trigger select bit (6)
(b6-b5)
Reserved bits
0: TB2 interrupt
1: Underflow of TB2 interrupt
generation frequency setting counter [ICTB2]
Set to 0
RW
RW
Nothing is assigned. If necessary, set to 0.
When read, the content is 0.
(b7)
NOTES:
1. Write to this register after setting the PRC1 bit in the PRCR register to 1 (write enabled).
2. If the INV11 bit is 0 (three-phase mode 0) or the INV06 bit is 1 (triangular wave modulation mode), set this bit to 0 (timer
B2 underflow).
3. When setting the IVPCR1 bit to 1 (three-phase output forcible cutoff by SD pin input enabled), Set the PD85 bit to 0 (= input
mode).
4. Related pins are U(P80), U(P81), V(P72), V(P73), W(P74), W(P75). When a high-level ("H") signal is applied to the SD pin
and set the IVPCR1 bit to 0 after forcible cutoff, pins U, U, V, V, W, and W are exit from the high-impedance state. If a lowlevel (“L”) signal is applied to the SD pin, three-phase motor control timer output will be disabled (INV03=0). At this time,
when the IVPCR1 bit is 0, pins U, U, V, V, W, and W become programmable I/O ports. When the IVPCR1 bit is set to 1,
pins U, U, V, V, W, and W are placed in a high-impedance state regardless of which function of those pins is used.
5. When this bit is used in delayed trigger mode 0, set bits TB0EN and TB1EN to 1 (A/D trigger mode).
6. When setting the TB2SEL bit to 1 (underflow of TB2 interrupt generation frequency setting counter[ICTB2]), set the INV02
bit to 1 (three-phase motor control timer function).
7. Refer to "19.6 Digital Debounce Function" for the SD input.
The effect of SD pin input is below.
1.Case of INV03 = 1(Three-phase motor control timer output enabled)
IVPCR1 bit
Status of U/V/W pins
SD pin inputs(3)
1
(Three-phase output
forcrible cutoff enable)
H
0
(Three-phase output
forcrible cutoff disable)
H
L(1)
L(1)
Remarks
Three-phase PWM output
High impedance(4)
Three-phase output
forcrible cutoff
Three-phase PWM output
Input/output port(2)
NOTES:
1. When "L" is applied to the SD pin, INV03 bit is changed to 0 at the same time.
2. The value of the port register and the port direction register becomes effective.
3. When SD function is not used, set to 0 (Input) in PD85 and pullup to "H" in SD pin from outside.
4. To leave the high-impedance state and restart the three-phase PWM signal output after the three-phase PWM signal
output forced cutoff, set the IVPCR1 bit to 0 after the SD pin input level becomes high (“H”).
2.Case of INV03 = 0(Three-phase motor control timer output disabled)
IVPCR1 bit
SD pin inputs
Status of U/V/W pins
1
(Three-phase output
forcrible cutoff enable)
H
Peripheral input/output
or input/output port
L
High impedance
0
(Three-phase output
forcrible cutoff disable)
H
Peripheral input/output
or input/output port
Peripheral input/output
or input/output port
L
Remarks
Three-phase output
forcrible cutoff(1)
NOTE:
1. The three-phase output forcrible cutoff function becomes effective if the INPCR1 bit is set to 1 (three-phase output
forcrible cutoff function enable) even when the INV03 bit is 0 (three-phase motor control timer output disalbe)
Figure 12.30 TB2SC Register
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12. Timer (Three-phase Motor Control Timer Function)
M16C/29 Group
Timer B2 Register (1)
(b15)
b7
(b8)
b0 b7
b0
Symbol
TB2
Address
039516-039416
After Reset
Undefined
Setting Range
Function
Divide the count source by n + 1 where n = set value.
Timer A1, A2 and A4 are started at every occurrence of
underflow.
000016 to FFFF16
RW
RW
NOTE:
1. Access the register by 16 bit units.
Trigger Select Register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
TRGSR
Address
038316
Bit Symbol
Bit Name
TA1TGL
Timer A1 event/trigger
select bit
TA1TGH
TA2TGL
Timer A2 event/trigger
select bit
TA2TGH
TA3TGL
Timer A3 event/trigger
select bit
TA3TGH
TA4TGL
Timer A4 event/trigger
select bit
TA4TGH
After Reset
0016
Function
To use the V-phase output control
circuit, set these bits to “01 2”(TB2
underflow).
To use the W-phase output control
circuit, set these bits to “01 2”(TB2
underflow).
b5 b4
RW
RW
RW
RW
RW
0 0 : Input on TA3 IN is selected (1)
0 1 : TB2 is selected (2)
1 0 : TA2 is selected (2)
1 1 : TA4 is selected (2)
RW
To use the U-phase output control
circuit, set these bits to “01 2”(TB2
underflow).
RW
RW
RW
NOTES:
1. Set the corresponding port direction bit to 0 (input mode).
2. Overflow or underflow.
Count Start Flag
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
TABSR
Bit Symbol
Address
038016
After reset
0016
Bit Name
Function
Timer A0 count start flag
TA1S
Timer A1 count start flag
TA2S
Timer A2 count start flag
RW
TA3S
Timer A3 count start flag
RW
TA4S
Timer A4 count start flag
RW
TB0S
Timer B0 count start flag
RW
TB1S
Timer B1 count start flag
RW
TB2S
Timer B2 count start flag
RW
0 : Stops counting
1 : Starts counting
Figure 12.31 TB2 Register, TRGSR Register, and TABSR Register
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RW
TA0S
page 132 of 458
RW
RW
12. Timer (Three-phase Motor Control Timer Function)
M16C/29 Group
Timer Ai Mode Register
Symbol
TA1MR
TA2MR
TA4MR
b7 b6 b5 b4 b3 b2 b1 b0
0 1
0 1 0
Bit Symbol
TMOD0
Address
0397 16
0398 16
039A 16
After Reset
0016
0016
0016
Bit Name
Function
RW
Operation mode
select bit
Set to 10 2 (one-shot timer mode) for the
three-phase motor control timer function
RW
MR0
Pulse output function
select bit
Set to 0 for the three-phase motor control
timer function
RW
MR1
External trigger select bit
No effect for the three-phase motor control
timer function
RW
MR2
Trigger select bit
Set to 1 (selected by event/trigger select
register) for the three-phase motor control
timer function
RW
MR3
Set to 0 for the three-phase motor control timer function
TMOD1
b7 b6
TCK0
Count source select bit
TCK1
RW
RW
RW
0 0 : f1 or f2
0 1 : f8
1 0 : f32
1 1 : fC32
RW
Timer B2 Mode Register
b7 b6 b5 b4 b3 b2 b1 b0
0
0 0
Symbol
TB2MR
Address
039D 16
Bit Symbol
Bit Name
TMOD0
Operation mode select bit
TMOD1
After Reset
00XX0000 2
Function
Set to 00 2 (timer mode) for the threephase motor control timer function
RW
RW
RW
RW
MR1
No effect for the three-phase motor control timer function.
If necessary, set to 0. When read, the contents are undefined
MR2
Set to 0 for the three-phase motor control timer function
RW
MR3
When write in three-phase motor control timer function, write 0.
When read, the content is undefined
RO
MR0
RW
b7 b6
TCK0
Count source select bit
TCK1
0 0: f1 or f2
0 1: f8
1 0: f32
1 1: fC32
Figure 12.32 TA1MR, TA2MR, TA4MR, and TB2MR Registers
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RW
RW
12. Timer (Three-phase Motor Control Timer Function)
M16C/29 Group
The three-phase motor control timer function is enabled by setting the INV02 bit in the INVC0 register to 1.
When this function is on, timer B2 is used to control the carrier wave, and timers A4, A1 and A2 are used to
__
___
___
control three-phase PWM outputs (U, U, V, V, W and W). The dead time is controlled by a dedicated deadtime timer. Figure 12.33 shows the example of triangular modulation waveform, and Figure 12.34 shows
the example of sawtooth modulation waveform.
Triangular waveform as a Carrier Wave
Triangular wave
Signal wave
TB2S bit in the
TABSR register
Timer B2
Start trigger signal
for timer A4(1)
m
Timer A4
one-shot pulse(1)
m
n
p
n
p
Rewrite registers IDB0 and IDB1
U phase
output signal (1)
Transfer the values
to the three-phase
output shift register
U phase
output signal (1)
INV14 = 0
(“L” active)
U phase
U phase
Dead time
INV14 = 1
(“H” active)
U phase
Dead time
U phase
INV13
(INV11=1(three-phase
mode 1))
NOTE:
1. Internal signals. See Figure 12.25.
The above applies under the following conditions:
INVC0 = 00XX11XX2 (X varies depending on each system) and INVC1 = 010XXXX02.
Examples of PWM output change are:
(2)When INV11 = 0 (three-phase mode 0)
(1)When INV11 = 1 (three-phase mode 1)
· INV01 = 0, ICTB2 = 116 (the timer B2 interrupt is generated
· INV01 = 0 and ICTB2 = 216 (the timer B2 interrupt is generated
whenever timer B2 underflows)
every two times the timer B2 underflows),
· Default value of the timer: TA4 = m. The TA4 register is changed
or INV01 = 1, INV00 = 1, and ICTB2=116 (the timer B2 interrupt is
whenever the timer B2 interrupt is generated.
generated at the falling edge of the timer A1 reload control signal.)
First time: TA4 = m. Second tim:, TA4 = n.
· Default value of the timer: TA41 = m, TA4 = m.
Third time: TA4 = n. Fourth time: TA4 = p.
Registers TA4 and TA41 are changed whenever the timer B2
Fifth time: TA4 = p.
interrupt is generated.
· Default values of registers IDB0 and IDB1:
First time, TA41 = n, TA4 = n. Second time, TA41 = p, TA4 = p.
DU0 = 1, DUB0 = 0, DU1 = 0, DUB1 = 1.
· Default values of registers IDB0 and IDB1:
They are changed to DU0 = 1, DUB0 = 0, DU1 = 1, and DUB1 = 0
DU0 = 1, DUB0 = 0, DU1 = 0, DUB1 = 1.
when the sixth timer B2 interrupt is generated.
They are changed to DU0 = 1, DUB0 = 0, DU1= 1 and DUB1 = 0
when the third timer B2 interrupt is generated.
The value written to registers TA4 and TA41 becomes effective at the rising edge of the timer A1 reload control signal.
Figure 12.33 Triangular Wave Modulation Operation
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12. Timer (Three-phase Motor Control Timer Function)
M16C/29 Group
Sawtooth Waveform as a Carrier Wave
Sawtooth wave
Signal wave
Timer B2
Start trigger signal
for timer A4(1)
Timer A4
one-shot pulse(1)
Rewrite registers
IDB0 and IDB1
Transfer the values to the threephase output shift register
U phase
output signal (1)
U phase
output signal (1)
INV14 = 0
(“L” active)
U phase
Dead time
U phase
INV14 = 1
(“H” active)
U phase
Dead time
U phase
NOTE:
1. Internal signals. See Figure 12.25.
The above applies under the following conditions:
INVC0 = 01XX110X2 (X varies depending on each system) and INVC1 = 010XXX002.
Examples of PWM output change are:
• Default value of registers IDB0 and IDB1: DU0=0, DUB0=1, DU1=1, DUB1=1.
They are changed to DU0=1, DUB0=0, DU1=1, DUB1=1 when the timer B2 interrupt is generated.
Figure 12.34 Sawtooth Wave Modulation Operation
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12. Timer (Three-phase Motor Control Timer Function)
M16C/29 Group
12.3.1 Position-Data-Retain Function
This function is used to retain the position data synchronously with the three-phase waveform
output.There are three position-data input pins for U, V, and W phases.
A trigger to retain the position data (hereafter, this trigger is referred to as "retain trigger") can be selected
by the PDRT bit in the PDRF register. This bit selects the retain trigger to be the falling edge of each
positive phase, or the rising edge of each positive phase.
12.3.1.1 Operation of the Position-data-retain Function
Figure 12.35 shows a usage example of the position-data-retain function (U phase) when the retain
trigger is selected as the falling edge of the positive signal.
(1) At the falling edge of the U-phase waveform ouput, the state at pin IDU is transferred to the PDRU
bit in the PDRF register.
(2) Until the next falling edge of the Uphase waveform output,the above value is retained.
1
2
Carrier wave
U-phase waveform output
U-phase waveform output
Pin IDU
PDRU bit
Transferred
Transferred
Transferred
Transferred
Note: The retain trigger is the falling edge of the positive signal.
Figure 12.35 Usage Example of Position-data-retain Function (U phase )
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12. Timer (Three-phase Motor Control Timer Function)
M16C/29 Group
12.3.1.2 Position-data-retain Function Control Register
Figure 12.36 shows the structure of the position-data-retain function contol register.
Position-Data-Retain Function Control Register (1)
b7
b3
b2
b1
b0
Symbol
Address
After Reset
PDRF
034E16
XXXX 00002
Bit Symbol
Bit Name
PDRW
W-phase position
data retain bit
PDRV
V-phase position
data retain bit
PDRU
U-phase position
data retain bit
PDRT
Retain-trigger
polarity select bit
(b7-b4)
Function
Input level at pin IDW is read out.
0: "L" level
1: "H" level
Input level at pin IDV is read out.
0: "L" level
1: "H" level
Input level at pin IDU is read out.
0: "L" level
1: "H" level
0: Rising edge of positive phase
1: Falling edge of positive phase
Nothing is assigned. If necessary, set to 0. When read,
the contents are undefined
NOTE:
1.This register is valid only in the three-phase mode.
Figure 12.36 PDRF Register
12.3.1.2.1 W-phase Position Data Retain Bit (PDRW)
This bit is used to retain the input level at pin IDW.
12.3.1.2.2 V-phase Position Data Retain Bit (PDRV)
This bit is used to retain the input level at pin IDV.
12.3.1.2.3 U-phase Position Data Retain Bit (PDRU)
This bit is used to retain the input level at pin IDU.
12.3.1.2.4 Retain-trigger Polarity Select Bit (PDRT)
This bit is used to select the trigger polarity to retain the position data.
When this bit is set to 0, the rising edge of each positive phase selected.
When this bit is set to 1, the falling edge of each pocitive phase selected.
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RW
RO
RO
RO
RW
12. Timer (Three-phase Motor Control Timer Function)
M16C/29 Group
12.3.2 Three-phase/Port Output Switch Function
When the INVC03 bit in the INVC0 register set to 1 (Timer output enabled for three-phase motor control)
__
and setting the PFCi (i=0 to 5) in the PFCR register to 0 (I/O port), the three-phase PWM output pin (U, U,
__
___
V, V, W and W) functions as I/O port. Each bit of the PFCi bits (i=0 to 5) is applicable for each one of
three-phase PWM output pins. Figure 12.37 shows the example of three-phase/port output switch function. Figure 12.38 shows the PFCR register and the three-phase protect control register.
Timer B2
U phase
V Phase
Functions as port P72
W phase
Functions as port P74
Writing PFCR register
PFC0 bit: 1
PFC2 bit: 1
PFC4 bit: 0
Writing PFCR register
PFC0 bit: 1
PFC2 bit: 0
PFC4 bit: 1
Figure 12.37 Usage Example of Three-phse/Port Output Switch Function
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12. Timer (Three-phase Motor Control Timer Function)
M16C/29 Group
Port Function Control Register (1)
b7
b5
b4
b3
b2
b1
b0
Symbol
Address
PFCR
035816
Bit Symbol
Bit Name
PFC0
Port P80 output
function select bit
PFC1
Port P81 output
function select bit
PFC2
Port P72 output
function select bit
PFC3
Port P73 output
function select bit
PFC4
Port P74 output
function select bit
PFC5
Port P75 output
function select bit
(b7-b6)
After Reset
0011 11112
Function
0: Input/Output port P80
1: Three-phase PWM output
(U phase output)
0: Input/Output port P81
1: Three-phase PWM output
(U phase output)
0: Input/Output port P72
1: Three-phase PWM output
(V phase output)
0: Input/Output port P73
1: Three-phase PWM output
(V phase output)
0: Input/Output port P74
1: Three-phase PWM output
(W phase output)
0: Input/Output port P75
1: Three-phase PWM output
(W phase output)
RW
RW
RW
RW
RW
RW
RW
Nothing is assigned. If necessary, set to 0. When read,
the contents are 0
NOTE:
1. This register is valid only when the INVC03 bit in the INVC0 register is 1 (Three-phase motor control
timer.
Three-phase Protect Control Register
b7
b3
b2
b1
b0
Symbol
TPRC
Bit Symbol
Address
025A16
Bit Name
Function
Enable write to PFCR register
0: Write protected
1: Write enabled
TPRC0
Three-phase
protect control bit
(b7-b1)
Nothing is assigned. If necessary, set to 0. When read,
the contents are 0
Figure 12.38 PFCR Register, and TPRC Register
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After Reset
0016
page 139 of 458
RW
RW
13. Timer S
M16C/29 Group
13. Timer S
The Timer S (Input Capture/Output Compare : here after, Timer S is referred to as "IC/OC".) is a highperformance I/O port for time measurement and waveform generation.
The IC/OC has one 16-bit base timer for free-running operation and eight 16-bit registers for time measurement and waveform generation.
Table 13.1 lists functions and channels of the IC/OC.
Table 13.1 IC/OC Functions and Channels
Function
Description
Time measurement (1)
8 channels
Digital filter
8 channels
Trigger input prescaler
2 channels
Trigger input gate
2 channels
Waveform generation (1)
8 channels
Single-phase waveform output
Available
Phase-delayed waveform output
Available
Set/Reset waveform output
Available
NOTE:
1. The time measurement function and the waveform generating function share a pin.
The time measurement function or waveform generating function can be selected for each channel.
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13. Timer S
M16C/29 Group
Figure 13.1 shows the block diagram of the IC/OC.
PCLK0=0
1/2
Main clock,
PLL clock,
On-chip
oscillator clock
f1 or f2
PCLK0=1
Request by matching G1BTRR and base timer
Request by matching G1PO0 register and base timer
Request from INT1 pin
Base timer reset
BTS
BCK1 to BCK0
11
f1 or f2
Two-phase
pulse input
(n+1)
Divider register
(G1DV)
10
fBT1
Base timer
Base timer reset
register (G1BTRR)
INPC10
INPC11
Digital
filter
INPC12
Digital
filter
INPC13
Digital
filter
INPC14
Digital
filter
INPC15
INPC16
INPC17
Digital
filter
Digital
debounce
Digital
filter
Digital
filter
Digital
filter
10:fBT1
11: f1 or f2
G1TM0, G1PO0
(Note 1)
register
Edge
select
CTS1 to CTS0
DF1 to DF0
00
Edge
select
CTS1 to CTS0
G1TM1, G1PO1
register
DF1 to DF0
00
Edge
select
G1TM2, G1PO2
register
CTS1 to CTS0
10:fBT1
11: f1 or f2
10:fBT1
11: f1 or f2
10:fBT1
11: f1 or f2
DF1 to DF0
00
10:fBT1
11: f1 or f2
DF1 to DF0
00
10:fBT1
11: f1 or f2
DF1 to DF0
00
DF1 to DF0
10:fBT1
11: f1 or f2
Base timer interrupt request
Base timer reset request
00
DF1 to DF0
00
10:fBT1
11: f1 or f2
Base timer over flow request
00
DF1 to DF0
Edge
select
CTS1 to CTS0
G1TM3, G1PO3
register
Edge
select
CTS1 to CTS0
G1TM4, G1PO4
register
Edge
select
CTS1 to CTS0
G1TM5, G1PO5
register
0
Edge
select
Gate
function
1
CTS1 to CTS0
Edge
select
Gate
1
function
CTS1 to CTS0
GT
OUTC11
OUTC12
PWM
output
OUTC13
OUTC14
PWM
output
OUTC15
0
Prescaler
function
1
Prescaler
function
1
PR
0
GT
OUTC10
PWM
output
G1TM6, G1PO6
register
0
PR
G1TM7, G1PO7
register
OUTC16
PWM
output
OUTC17
Ch0 to ch7
interrupt request signal
BCK1 to BCK0 : Bits in the G1BCR0 register
BTS: Bits in the G1BCR1 register
CTS1 to CTS0, DF1 to DF0, GT, PR : Bits in the G1TMCRj register (j= 0 to 7)
PCLK0 : Bits in the PCLKR register
Figure 13.1 IC/OC Block Diagram
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
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13. Timer S
M16C/29 Group
Figures 13.2 to 13.10 show registers associated with the IC/OC base timer, the time measurement function, and the waveform generating function.
Base Timer Register
b15
(b7)
b8
(b0) b7
b0
(1)
Symbol
G1BT
Address
032116 - 032016
After Reset
Undefined
Setting Range
Function
When the base timer is operating:
When read, the value of base timer plus 1 can
be read. When write, the counter starts counting
from the value written. When the base timer is
reset, this register is set to 000016. (2)
When the base timer is reset:
This register is set to 000016 but a value read is
undefined. No value is written. (2)
000016 to FFFF16
RW
RW
NOTES:
1. The G1BT register reflects the value of the base timer, synchronizing with the count source fBT1 cycles.
2. This base timer stops only when bits BCK1 to BCK0 in the G1BCR0 register are set to 002 (count source
clock stop). The base timer operates when bits BCK1 to BCK0 are set to other than 002. When the BTS
bit in the G1BCR1 register is set to 0, the base timer is reset continuously, and remaining set to 000016.
When the BTS bit is set to 1, this state is cleared and the timer starts counting.
Base Timer Control Register 0
b7
b6
b5
b4
b3
0 0 0
b2
b1
b0
Symbol
G1BCR0
Address
032216
Bit Symbol
After Reset
0016
Bit Name
Function
RW
b1 b0
BCK0
Count source
select bit
BCK1
0
0
1
1
0 : Clock stop
1 : Do not set to this value
0 : Two-phase input (1)
1 : f1 or f2 (2)
RW
RST4
Base timer reset
cause select bit 4
0: Do not reset Base timer by matching
G1BTRR
1: Reset Base timer by matching
G1BTRR(3)
RW
(b5-b3)
Reserved bit
Set to 0
RW
Channel 7 input
select bit
0: P27/OUTC17/INPC17 pin
1: P17/INT5/INPC17/IDU pin
RW
Base timer
interrupt select bit
0: Bit 15 in the base timer overflows
1: Bit 14 in the base timer overflows
RW
CH7INSEL
IT
NOTES:
1. This setting can be used when bits UD1 to UD0 in the G1BCR1 register are set to 102 (twophase signal processing mode). Do not set bits BCK1 and BCK0 to 102 in other modes.
2. When the PCLK0 bit in the PCLKR register is set to 0, the count source is f2 cycles. And when
the PCLK0 bit is set to set to 1, the count source is f1 cycles.
3. When the RST4 bit is set to 1, set the RST1 bit in the G1BCR1 register to 0.
Figure 13.2 G1BT and G1BCR0 Registers
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
RW
page 142 of 458
13. Timer S
M16C/29 Group
Divider Register
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
G1DV
Address
032A16
Function
After Reset
0016
Setting range
Divide f1, f2 or two-phase pulse input by (n+1)
for fBT1 clock cycles generation.
n: the setting value of the G1DV register
0016 to FF16
RW
RW
Base Timer Control Register 1
b7
b6
b5
b4
0
b3
0
b2
b1
b0
Symbol
0
G1BCR1
Bit
Symbol
(b0)
Address
032316
Bit Name
Reserved bit
After Reset
0016
Function
Set to 0
RW
RW
RST1
Base timer reset
cause select bit 1
0: The base timer is not reset by
matching the G1PO0 register
1: The base timer is reset by matching
with the G1PO0 register (1)
RST2
Base timer reset
cause select bit 2
0: The base timer is not reset by
applying "L" to the INT1 pin
RW
1: The base timer is reset by applying "L"
to the INT1 pin
(b3)
Reserved bit
BTS
Base timer start bit
(b7)
0: Base timer is reset
1: Base timer starts counting
RW
RW
b6 b5
UD0
UD1
Set to 0
RW
Counter increment/
decrement control bit
Reserved bit
0 0: Counter increment mode
RW
0 1: Counter increment/decrement mode
1 0: Two-phase pulse signal processing
mode
RW
1 1: Do not set to this value
Set to 0
RW
NOTS:
1. The base timer is reset two fBT1 clock cycles after the base timer matches the value set in the
G1PO0 register. (See Figure 13.7 for details on the G1PO0 register) When the RST1 bit is set to 1,
the value of the G1POj register (j=1 to 7) for the waveform generating function must be set to a
value smaller than that of the G1PO0 register.
When the RST1 bit is set to 1, set the RST4 bit in the G1BCR0 register to 0.
Figure 13.3 G1DV Register and G1BCR1 Register
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13. Timer S
M16C/29 Group
Base Timer Reset Register(1)
b15
(b7)
b8
(b0) b7
Symbol
G1BTRR
b0
Address
032916 - 032816
Function
When enabled by the RST4 bit in the G1BCR0
register, the base timer is reset by matching the
G1BTRR register setting value and the base
timer setting value.
After Reset
Undefined
Setting Range
RW
000016 to FFFF16
RW
NOTE:
1. The G1BTRR register reflects the value of the base timer, synchronizing with the count source fBT1 cycles.
Figure 13.4 G1BTRR Register
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REJ09B0101-0112
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13. Timer S
M16C/29 Group
Time Measurement Control Register j (j=0 to 7)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
G1TMCR0 to G1TMCR3
G1TMCR4 to G1TMCR7
Bit
Symbol
CTS0
CTS1
DF0
DF1
GT
Address
031816, 031916, 031A16, 031B16
031C16, 031D16, 031E16, 031F16
Bit Name
After Reset
0016
0016
Function
RW
b1 b0
Time measurement
trigger select bit
0
0
1
1
RW
0 : No time measurement
1 : Rising edge
0 : Falling edge
1 : Both edges
RW
b3 b2
Digital filter function
select bit
Gate function
select bit (2)
0
0
1
1
RW
0 : No digital filter
1 : Do not set to this value
0 : fBT1
1 : f1 or f2 (1)
RW
0: Gate function is not used
1: Gate function is used
RW
0: Not cleared
1: The gate is cleared when the base RW
timer matches the G1POk register
GOC
Gate function clear
select bit (2, 3, 4)
GSC
Gate function clear
bit (2, 3)
The gate is cleared by setting the
GSC bit to 1
RW
PR
Prescaler function
select bit (2)
0: Not used
1: Used
RW
NOTES:
1. When the PCLK0 bit in the PCLKR register is set to 0, the count source is f2 cycles. And when the
PCLK0 bit is set to 1, the count source is f1 cycles.
2. These bits are in registers G1TMCR6 and G1TMCR7. Set all bits 4 to 7 in registers G1TMCR0 to
G1TMCR5 to 0.
3. These bits are enabled when the GT bit is set to 1.
4. The GOC bit is set to 0 after the gate function is cleared. See Figure 13.7 for details on the G1POk
register (k=4 when j=6 and k=5 when j=7).
Time Measurement Prescale Register j (j=6,7)
b7
b0
Symbol
Address
G1TPR6 to G1TPR7 032416, 032516
(1)
After Reset
0016
Function
As the setting value is n, time is measured whenever a trigger input is counted by n+1 (2)
Setting Range
RW
0016 to FF16
RW
NOTES:
1. The G1TPR6 to G1TPR7 registers reflect the base timer value, synchronizing with the count source
fBT1 cycles.
2. The first prescaler, after the PR bit in the G1TMCRj register is changed from 0 (not used) to 1
(used), may be divided by n, rather than n+1. The subsequent prescaler is divided by n+1.
Figure 13.5 G1TMCR0 to G1TMCR7 Registers, and G1TPR6 to G1TPR7 Registers
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
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13. Timer S
M16C/29 Group
Waveform Generation Register j (j=0 to 7)
b8
b15
(b0) b7
(b7)
Symbol
G1TM0 to G1TM2
G1TM3 to G1TM5
G1TM6 to G1TM7
b0
Address
030116-030016, 030316-030216, 030516-030416
030716-030616, 030916-030816, 030B16-030A16
030D16-030C16, 030F16-030E16
Function
After Reset
Indeterminte
Indeterminte
Indeterminte
Setting Range
The base timer value is stored every
measurement timing
RW
RO
Waveform Generation Control Register j (j=0 to 7)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
G1POCR0 to G1POCR3
G1POCR4 to G1POCR7
Bit
Symbol
MOD0
Address
031016, 031116, 031216, 031316
031416, 031516, 031616, 031716
Bit Name
Function
RW
b1b0
Operating mode
select bit
MOD1
(b3-b2)
After Reset
0X00 XX002
0X00 XX002
0 0 : Single waveform output mode
0 1 : SR waveform output mode (1)
1 0 : Phase-delayed waveform
output mode
1 1 : Do not set to this value
RW
RW
Nothing is assigned. If necessary, set to 0.
When read, their contents are undefined
IVL
Output initial value
select bit(4)
0: "L" output as a default value
1: "H" output as a default value
RLD
G1POj register value
reload timing select bit
0: Reloads the G1POj register when
value is written
RW
1: Reloads the G1POj register when
the base timer is reset
(b6)
Nothing is assigned. If necessary, set to 0.
When read, its content is undefined
INV
Inverse output function
select bit (2)
0: Output is not inversed
1: Output is inversed
RW
RW
NOTES :
1. This setting is enabled only for even channels. In SR waveform output mode, values written to the
corresponding odd channel (next channel after an even channel) are ignored. Even channels
provide waveform output. Odd channels provide no waveform output.
2. The inverse output function is the final step in waveform generating process. When the INV bit is set
to 1, and "H" signal is provided a default output by setting the IVL bit to 0, and an "L" signal is
provided by setting it to 1.
3. In the SR waveform output mode, set not only the even channel but also the correspoinding even
channel (next channel after the even channel).
4. To provide either "H" or "L" signal output set in the IVL bit, set the FSCj bit in the G1FS register to 0
(select waveform generating function) and IFEj bit in the G1FE register to 1 (functions for channel j
enabled). Then set the IVL bit to 0 or 1.
Figure 13.6 G1TM0 to G1TM7 Registers, and G1POCR0 to G1POCR7 Registers
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
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13. Timer S
M16C/29 Group
Waveform Generation Register j (j=0 to 7)
b15
(b7)
b8
(b0) b7
b0
Symbol
G1PO0 to G1PO2
G1PO3 to G1PO5
G1PO6 to G1PO7
Address
030116-030016, 030316-030216, 030516-030416
030716-030616, 030916-030816, 030B16-030A16
030D16-030C16, 030F16-030E16
Function
When the RLD bit in the G1POCRj register is
set to 0, value written is immediately reloaded
into the G1POj register for output, for example,
a waveform output,reflecting the value.
When the RLD bit is set to 1, value reloaded
while the base timer is reset.
The value written can be read until reloaded
Figure 13.7 G1PO0 to G1PO7 Registers
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REJ09B0101-0112
page 147 of 458
After Reset
Undefined
Undefined
Undefined
Setting Range
RW
000016 to FFFF16
RW
13. Timer S
M16C/29 Group
Function Select Register
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
G1FS
Bit
Symbol
Address
032716
Bit Name
Channel 0 time measurement/waveform generating
function select bit
Channel 1 Time Measurement/Waveform Generating
Function Select Bit
Channel 2 time measurement/waveform generating
function select bit
FSC0
FSC1
FSC2
After Reset
0016
RW
Function
0: Select the waveform generating
function
1: Select the time measurement
function
FSC4
RW
RW
Channel 5 time measurement/waveform generating
function select bit
Channel 6 time measurement/waveform generating
function select bit
FSC5
FSC6
RW
RW
Channel 7 time measurement/waveform generating
function select bit
FSC7
RW
RW
Channel 3 time measurement/waveform generating
function select bit
Channel 4 time measurement/waveform generating
function select bit
FSC3
RW
RW
Function Enable Register(1)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
G1FE
Bit
Symbol
Address
032616
Bit Name
After Reset
0016
RW
Function
Channel 0 function enable bit
IFE1
Channel 1 function enable bit
IFE2
Channel 2 function enable bit
IFE3
Channel 3 function enable bit
RW
IFE4
Channel 4 function enable bit
RW
IFE5
Channel 5 function enable bit
RW
IFE6
Channel 6 function enable bit
RW
IFE7
Channel 7 function enable bit
RW
(2)
0 : Disable function s for channel j
1 : Enable functions for channel j
(j=0 to 7)
NOTES:
1. The G1FE register reflects the base timer value, synchronizing with the count source fBT1 cycles.
2. When functions for the channel j are disabled, each pin functions as an I/O port.
Figure 13.8 G1FS and G1FE Registers
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
RW
IFE0
page 148 of 458
RW
RW
13. Timer S
M16C/29 Group
Interrupt Request Register
b7
b6
b5
b4
b3
b2
b1
b0
(1)
Symbol
Address
After Reset
G1IR
033016
Undefined
Bit
Symbol
Bit Name
G1IR0
Interrupt request, Ch0
G1IR1
Interrupt request, Ch1
RW
G1IR2
Interrupt request, Ch2
RW
G1IR3
Interrupt request, Ch3
RW
G1IR4
Interrupt request, Ch4
RW
G1IR5
Interrupt request, Ch5
RW
G1IR6
Interrupt request, Ch6
RW
G1IR7
Interrupt request, Ch7
RW
Function
0 : No interrupt request
1 : Interrupt requested
NOTE:
1. When writing 0 to each bit in the G1IR register, use the following instruction:
AND, BCLR
Figure 13.9 G1IR Register
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 149 of 458
RW
RW
13. Timer S
M16C/29 Group
Interrupt Enable Register 0
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
G1IE0
Bit
Symbol
Address
033116
Bit Name
After Reset
0016
Function
0 : IC/OC interrupt 0 request disable
1 : IC/OC interrupt 0 request enable
RW
G1IE00
Interrupt enable 0, CH0
G1IE01
Interrupt enable 0, CH1
RW
G1IE02
Interrupt enable 0, CH2
RW
G1IE03
Interrupt enable 0, CH3
RW
G1IE04
Interrupt enable 0, CH4
RW
G1IE05
Interrupt enable 0, CH5
RW
G1IE06
Interrupt enable 0, CH6
RW
G1IE07
Interrupt enable 0, CH7
RW
RW
Interrupt Enable Register 1
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
G1IE1
Bit
Symbol
Bit Name
After Reset
0016
Function
0 : IC/OC interrupt 1 request disable
1 : IC/OC interrupt 1 request enable
RW
G1IE10
Interrupt enable 1, CH0
G1IE11
Interrupt enable 1, CH1
RW
G1IE12
Interrupt enable 1, CH2
RW
G1IE13
Interrupt enable 1, CH3
RW
G1IE14
Interrupt enable 1, CH4
RW
G1IE15
Interrupt enable 1, CH5
RW
G1IE16
Interrupt enable 1, CH6
RW
G1IE17
Interrupt enable 1, CH7
RW
Figure 13.10 G1IE0 and G1IE1 Registers
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
Address
033216
page 150 of 458
RW
13. Timer S
M16C/29 Group
13.1 Base Timer
The base timer is a free-running counter that counts an internally generated count source.
Table 13.2 lists specifications of the base timer. Table 13.3 shows registers associated with the base timer.
Figure 13.11 shows a block diagram of the base timer. Figure 13.12 shows an example of the base timer
in counter increment mode. Figure 13.13 shows an example of the base timer in counter increment/decrement mode. Figure 13.14 shows an example of two-phase pulse signal processing mode.
Table 13.2 Base Timer Specifications
Item
Specification
Count source(fBT1)
f1 or f2 divided by (n+1) , two-phase pulse input divided by (n+1)
n: determined by the DIV7 to DIV0 bits in the G1DV register. n=0 to 255
However, no division when n=0
Counting operation
The base timer increments the counter value
The base timer increments/decrements the counter value
Two-phase pulse signal processing
Count start condition
The BTS bit in the G1BCR1 register is set to 1 (base timer starts counting)
Count stop condition
The BTS bit in the G1BCR1 register is set to 0 (base timer reset)
Base timer reset condition
(1) The value of the base timer matches the value of the G1BTRR register
(2) The value of the base timer matches the value of G1PO0 register.
________
(3) Apply a low-level signal ("L") to external interrupt pin,INT1 pin
Value for base timer reset
000016
Interrupt request
The base timer interrupt request is generated:
(1) When the bit 14 or bit 15 in the base timer overflows
(2) The value of the base timer value matches the value of the base timer
reset register
Read from timer
• The G1BT register indicates a counter value while the base timer is running
• The G1BT register is undefined when the base timer is reset
Write to timer
When a value is written while the base timer is running, the timer counter
immediately starts counting from this value. No value can be written while
the base timer is reset.
Selectable function
• Counter increment/decrement mode
The base timer starts counting from 000016. After incrementing to FFFF16,
the timer counter is then decremented back to 000016. The base timer
increments the counter value again when the timer counter reaches 000016.
(See Figure 13.13)
• Two-phase pulse processing mode
Two-phase pulse signals from pins P80 and P81 are counted (See Figure
13.14)
P80
P81
The timer increments
a counter on all edges
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The timer decrements
a counter on all edges
13. Timer S
M16C/29 Group
fBT1
f1 or f2
Two-phase pulse input
11
BCK1 to BCK0
(n+1) divider
10
Base timer
b14 b15
(Note 1)
Overflow signal
Base timer
overflow request
0
BTS bit in G1BCR1 register
1
RST4
IT
Matched with G1BTRR
RST1
Matched with G1PO0 register
RST2
Input "L" to INT1 pin
Base timer reset
NOTE:
1. Divider is reset when the BTS bit is set to 0.
IT, RST4, BCK1 to BCK0: Bits in the G1BCR0 register
RST2 to RST1: Bits in the G1BCR1 register
Figure 13.11 Base Timer Block Diagram
Table 13.3 Base Timer Associated Register Settings (Time Measurement Function, Waveform
Generation Function, Communication Function)
Register
G1BCR0
G1BCR1
G1BT
G1DV
Bit
BCK1 to BCK0
RST4
IT
RST2 to RST1
BTS
UD1 to UD0
-
Function
Select a count source
Select base timer reset timing
Select the base timer overflow
Select base timer reset timing
Used to start the base timer
Select how to count
Read or write base timer value
Divide ratio of a count source
Set the following registers to set the RST1 bit to 1 (base timer reset by matching the base timer with the G1PO0 register)
G1POCR0
MOD1 to MOD0
Set to 002 (single-phase waveform output mode)
G1PO0
G1FS
G1FE
FSC0
IFE0
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REJ09B0101-0112
Set reset cycle
Set to 0 (waveform generating function)
Set to 1 (channel operation start)
page 152 of 458
13. Timer S
M16C/29 Group
FFFF16
C00016
State of a counter
800016
400016
000016
IT=1 in the G1BCR0 register
(Base timer interrupt generated
by the bit 14 overflow)
b14 overflow signal
1
0
Base Timer interrupts
IT=0 in the G1BCR0 register
(Base timer interrupt generated
by the bit 15 overflow)
b15 overflow signal
1
0
Base Timer interrupt
The above applies to the following conditions.
The RST4 bit in the G1BCR0 register is set to 0 (the base timer is not reset by matching the G1BTRR register)
The RST1 bit in the G1BCR1 register is set to 0 (the base timer is not reset by matching the G1PO0 register)
Bits UD1 to UD0 in the G1BCR1 register are set to 002 (counter increment mode)
Figure 13.12 Counter Increment Mode
FFFF16
State of a counter
C00016
800016
400016
000016
IT=1 in the G1BCR0 register
(Base timer interrupt generated
by the bit 14 overflow)
b14 overflow signal
1
0
Base Timer interrupts
IT=0 in the G1BCR0 register
(Base timer interrupt generated
by the bit 15 overflow)
b15 overflow signal
1
0
Base Timer interrupt
Figure 13.13 Counter Increment/Decrement Mode
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13. Timer S
M16C/29 Group
(1) When the base timer is reset while the base timer increments the counter
P80 (A-phase)
Input waveform
min 1 µs
P81 (B-phase)
(
fBT1
When selects no
division with the divider by (n+1)
min 1 µs
)
(Note 1)
INT1 (Z-phase)
Base timer starts counting
Value of counter
m
m+1
0
1
2
Set to 1 at this timing
Set to 0 at this timing
(2) When the base timer is reset while the base timer decrements the counter
P80 (A-phase)
Input waveform
min 1 µs
P81 (B-phase)
min 1 µs
fBT1
(
When selects no
division with the divider by (n+1)
)
(1)
INT1 (Z-phase)
Base timer starts counting
Value of counter
m
m-1
Set to 0 at this timing
0
FFFF16
FFFE16
Set to FFFF16 at this timing
NOTE:
1. 1.5 fBT1 clock cycle or more are required.
Figure 13.14 Base Timer Operation in Two-phase Pulse Signal Processing Mode
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13. Timer S
M16C/29 Group
13.1.1 Base Timer Reset Register(G1BTRR)
The G1BTRR register provides the capability to reset the base timer when the base timer count value
matches the value stored in the G1BTRR register. The G1BTRR register is enabled by the RST4 bit
in the G1BCR0 register. This function is identical in operation to the G1PO0 base timer reset that is
enabled by the RST1 bit in the G1BCR0 reigster. If the free-running operation is not selected, the
channel 0 can be used for a waveform generation when the base timer is reset by the G1BTRR
register. Do not enable bits RST1 and RST4 simultaneously.
RST4
m-2
Base timer
m-1
m
G1BTRR register
m + 1 000016 000116
m
(Base timer reset register)
Base timer interrupt
Base timer overflow request (1)
NOTE:
1. Following conditions are required to generate a base timer overflow request by resetting the base timer.
If the IT bit is set to 0: 07FFF16 ≤ m ≤ 0FFFE16
If the IT bit is set to 1: 07FFF16 ≤ m ≤ 0FFFE16 or 0BFFF16 ≤ m ≤ 0FFFE16
Figure 13.15 Base Timer Reset operation by Base Timer Reset Register
RST1
Base timer
m-2
m-1
G1PO0
m
m + 1 000016 000116
m
G1IR0
Figure 13.16 Base Timer Reset operation by G1PO0 register
RST2
Base timer
m-2
m-1
m
m + 1 000016 000116
P83/INT1
NOTE:
________
________
1. INT1 Base Timer reset does not generate a Base Timer interrupt. INT1 may generate an interrupt if enabled.
_______
Figure 13.17 Base Timer Reset operation by INT1
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13. Timer S
M16C/29 Group
13.2 Interrupt Operation
The IC/OC interrupt contains several request causes. Figure 13.18 shows the IC/OC interrupt block diagram and Table 13.4 shows the IC/OC interrupt assignation.
When either the base timer reset request or base timer overflow request is generated, the IR bit in the BTIC
register corresponding to the IC/OC base timer interrupt is set to 1 (with an interrupt request). Also when an
interrupt request in each eight channels (channel i) is generated, the bit i in the G1IR register is set to 1 (with
an interrupt request). At this time, if the bit i in the G1IE0 register is 1 (IC/OC interrupt 0 request enabled),
the IR bit in the ICOC0IC register corresponding to the IC/OC interrupt 0 is set to 1 (with an interrupt
request). And if the bit i in the G1IE1 register is 1 (IC/OC interrupt 1 request enabled), the IR bit in the
ICOC1IC register corresponding to the IC/OC interrupt 1 is set to 1(with an interrupt request).
Additionally, because each bit in the G1IR register is not automatically set to 0 even if the interrupt is
acknowledged, set to 0 by program. If these bits are left as 1, all IC/OC channel interrupt causes, which are
generated after setting the IR bit to 1, will be disabled.
Interrupt Select Logic
DMA Requests (channel 0 to 7)
Channel 0 to 7 Interrupt requests
All register are read / write
G1IE0
ENABLE
G1IE1
G1IR
ENABLE
REQUEST
IC/OC interrupt 1 request
IC/OC interrupt 0 request
Base timer reset request
IC/OC base timer interrupt request
Base timer overflow request
Base Timer Interrupt / DMA Request
Figure 13.18 IC/OC Interrupt and DMA request generation
Table 13.4 Interrupt Assignment
Interrupt
IC/OC base timer interrupt
IC/OC interrupt 0
IC/OC interrupt 1
Interrupt control register
BTIC(004716)
ICOC0IC(004516)
ICOC0IC(004616)
13.3 DMA Support
Each of the interrupt sources - the eight IC/OC channel interrupts and the one Base Timer interrupt - are
capable of generating a DMA request.
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13. Timer S
M16C/29 Group
13.4 Time Measurement Function
In synchronization with an external trigger input, the value of the base timer is stored into the G1TMj
register (j=0 to 7). Table 13.5 shows specifications of the time measurement function. Table 13.6 shows
register settings associated with the time measurement function. Figures 13.19 and 13.20 display operational timing of the time measurement function. Figure 13.21 shows operational timing of the prescaler
function and the gate function.
Table 13.5 Time Measurement Function Specifications
Item
Specification
Measurement channel
Channels 0 to 7
Selecting trigger input polarity
Rising edge, falling edge, both edges of the INPC1j pin (1)
Measurement start condition
The IFEj bit in the G1FE register should be set to 1 (channels j function
enabled) when the FSCj bit (j=0 to 7) in the G1FS register is set to 1 (time
measurement function selected).
Measurement stop condition
The IFEj bit should be set to 0 (channel j function disabled)
Time measurement timing
•No prescaler : every time a trigger signal is applied
•Prescaler (for channel 6 and channel 7):
every G1TPRk (k=6,7) register value +1 times a trigger signal is applied
Interrupt request generation timing
The G1IRi bit (i=0 to 7) in the interrupt request register (See Figure 13.9) is
set to 1 at time measurement timing
INPC1j pin function
(1)
Trigger input pin
Selectable function
• Digital filter function
The digital filter samples a trigger input signal level every f1, f2 or fBT1
cycles and passes pulse signal matching trigger input signal level three
times
• Prescaler function (for channel 6 and channel 7)
Time measurement is executed every G1TPRk register value +1 times a
trigger signal is applied
• Gate function (for channel 6 and channel 7)
After time measurement by the first trigger input, trigger input cannot be
accepted. However, while the GOC bit in the G1TMCRk register is set to 1
(gate cleared by matching the base timer with the G1POp register (p=4
when k=6, p=5 when k=7)), trigger input can be accepted again by
matching the base timer value with the G1POp register setting
• Digital Debounce function (for channel7)
________
See 13.6.2 Digital Debounce Function for P17/INT5/INPC17 and 19.6
Digital Debounce Function for details
NOTE:
1. The INPC10 to INPC17 pins
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13. Timer S
M16C/29 Group
Table 13.6 Register Settings Associated with the Time Measurement Function
Register
G1TMCRj
Bit
Function
CTS1 to CTS0
Select time measurement trigger
DF1 to DF0
Select the digital filter function
GT, GOC, GSC
Select the gate function
PR
Select the prescaler function
G1TPRk
-
Setting value of prescaler
G1FS
FSCj
Set to 1 (time measurement function)
G1FE
IFEj
Set to 1 (channel j function enabled)
j = 0 to 7 k = 6, 7
Bit configurations and function varys with channels used.
Registers associated with the time measurement function must be set after setting registers associated with the base timer.
INPC1j pin input
FFFF16
n
Base timer
p
m
000016
G1TMj register
m
n
p
When setting to 0, write 0 by program
G1IRj bit
j = 0 to 7
G1IRj bit: Bits in the G1IR register
The above applies to the following condition.
Bits CTS1 to CTS0 in the G1TMCRj registers are set to 012 (rising edge). The PR bit is
set to 0 (no prescaler used) and the GT bit is set to 0 (no gate function used).
Bits RTS4, RTS2, and RTS1 in registers G1BCR0 and G1BCR1 are set to 0 (no base
timer reset). Bits UD1 to UD0 bits are set to 002 (counter increment mode).
Set the base timer to 000016 (setting the RST1 bit to 1, and bits RST4 and RST2 to 0),
when the base timer value matches the G1PO0 register setting. The base timer is set to 000016
after it reaches the G1PO0 register value + 2.
Figure 13.19 Time Measurement Function (1)
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13. Timer S
M16C/29 Group
(a) When selecting the rising edge as a timer measurement trigger
(Bits CTS1 and CTS0 in the G1TMCRj register (j=0 to 7)=012)
fBT1
Base timer
n-2
n-1
n
n+1
n+2
n+3
n+4
n+5
n+6
n+7
n+8
n+9 n+10 n+11 n+12 n+13 n+14
(2)
INPC1j pin input or
trigger signal after
passing the digital
filter
G1IRj bit (1)
write 0 by program if setting to 0
Delayed by 1 clock
G1TMj register
n
n +5
n+8
NOTES :
1. Bits in the G1IR register.
2. Input pulse applied to the INPC1j pin requires 1.5 fBT1 clock cycles. or more.
(b) When selecting both edges as a timer measurement trigger
(Bits CTS1 and CTS0 = 112)
fBT1
Base timer
n-2
n-1
n
n+1
n+2
n+3
n+4
n+5
n+6
n+7
n+8
n+9 n+10 n+11 n+12 n+13 n+14
INPC1j pin input or
trigger signal after
passing the digital
filter
G1IRj bit (1)
write 0 by program
if setting to 0
G1TMj register (2)
n
n+2
n+5
n+8
n+12
NOTES :
1. Bits in the G1IR register.
2. No interrupt is generated if the MCU receives a trigger signal when. the G1IRj bit is set to 1.
However, the value of the G1TMj register is updated.
(c) Trigger signal when using digital filter
(Bits DF1 to DF0 in the G1TMCRj register =102 or 112)
f1 or f2 or fBT1 (1)
INPC1j pin
Trigger signal after
passing the digital
filter
Signals, which do not match 3
times, are stripped off
NOTE:
1. fBT1 when bits DF1 to DF0 are set to 102, and f1 or f2 when set to 112.
Figure 13.20 Time Measurement Function (2)
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Maximum 3.5 f1 or f2 or fBT1
(1)
clock cycles
The trigger signal is delayed
by the digital filter
13. Timer S
M16C/29 Group
(a) With the prescaler function
(When the G1TPRj register (j = 6, 7) is set to 0216, the PR bit in the G1TMCRj register (j = 6, 7) is set to 1)
fBT1
Base timer
n-2
n-1
n
n+1
n+2
n+3
n+4
n+5
n+6
n+7
n+8
n+9 n+10 n+11
+12 n+13 n+14
INPC1j pin input or
trigger signal after
passing the digital
filter
Internal time
measurement trigger
2
Prescaler (1)
2
0
1
Set 0 by program if necessary
G1IRj bit (2)
G1TMj register
n+1
n+13
NOTES:
1. This applies to 2nd or later prescaler cycle after the PR bit in the G1TMCRj register is set to 1 (prescaler used).
2. Bits in the G1IR register.
(b) With the gate function
(The gate function is cleared by matching the base timer with the G1POk register(k = 4, 5),
the GT bit in the G1TMCRj register is set to 1, the GOC bit is set to 1)
fBT1
FFFF16
Value of the G1POk register
Base timer
000016
IFEj bit in G1FE
register
INPC1j pin input or
trigger signal after
passing the digital
filter
Internal time
measurement trigger
This trigger input is disabled
due to gate function.
G1POk register
match signal
Gate control signal
Gate
G1IRj bit (1)
G1TMj register
NOTE:
1. Bits in the G1IR register.
Figure 13.21 Prescaler Function and Gate Function
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Gate cleared
Set 0 by program if necessary
Gate
13. Timer S
M16C/29 Group
13.5 Waveform Generating Function
Waveforms are generated when the base timer value matches the G1POj (j=0 to 7) register value.
The waveform generating function has the following three modes :
• Single-phase waveform output mode
• Phase-delayed waveform output mode
• Set/Reset waveform output (SR waveform output) mode
Table 13.7 lists registers associated with the waveform generating function.
Table 13.7 Registers Related to the Waveform Generating Function Settings
Register
G1POCRj
G1POj
G1FS
G1FE
j = 0 to 7
Bit
MOD1 to MOD0
IVL
RLD
INV
FSCj
IFEj
Function
Select output waveform mode
Select default value
Select G1POj register value reload timing
Select inverse output
Select timing to output waveform inverted
Set to 0 (waveform generating function)
Set to 1 (enables function on channel j)
Bit configurations and functions vary with channels used.
Registers associated with the waveform generating function must be set after setting registers associated with the base timer.
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13. Timer S
M16C/29 Group
13.5.1 Single-Phase Waveform Output Mode
Output signal level of the OUTC1j pin becomes high ("H") when the INV bit in the G1POCRj (j=0 to 7)
register is set to 0(output is not reversed) and the base timer value matches the G1POj (j=0 to 7) register
value. The "H" signal switches to a low-level ("L") signal when the base timer reaches 000016. Table 13.8
lists specifications of single-phase waveform mode. Figure 13.22 lists an example of single-phase waveform mode operation.
Table 13.8 Single-phase Waveform Output Mode Specifications
Item
Specification
Output waveform
• Free-running operation
(bits RST1, RST2, and RST4 of registers G1BCR1 and G1BCR0 are set to 0
(no reset))
65536
fBT1
m
Default output level width :
fBT1
65536-m
Inverse level width
:
fBT1
Cycle
:
• The base timer is cleared to 000016 by matching the base timer with either
following register
(a) G1PO0 register (enabled by setting RST1 bit to 1, and RST4 and RST2 bits to 0), or
(b) G1BTRR register (enabled by setting RST4 bit to 1, and RST2 and RST1 bits to 0)
n+2
fBT1
m
Default output level width :
fBT1
n+2-m
Inverse level width
:
fBT1
m : setting value of the G1POj register (j=0 to 7), 000116 to FFFD16
Cycle
:
n : setting value of the G1PO0 register or the G1BTRR register, 000116 to FFFD16
Waveform output start condition
The IFEj bit in the G1FE register is set to 1 (channel j function enabled)
Waveform output stop condition
The IFEj bit is set to 0 (channel j function disabled)
Interrupt request
The G1IRj bit in the G1IR register is set to 1 when the base timer value
matches the G1POj register value (See Figure 13.22)
OUTC1j pin
(1)
Pulse signal output pin
Selectable function
• Default value set function: Set starting waveform output level
• Inverse output function: Waveform output signal is inversed and provided
from the OUTC1j pin
NOTE:
1. Pins OUTC10 to OUTC17.
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13. Timer S
M16C/29 Group
(1) Free-running operation
(The RST4, RST2, and RST1 bits in the G1BCR0 and G1BCR1 registers are set to 0)
FFFF16
Base timer
m
000016
m
fBT1
65536-m
fBT1
Inverse
OUTC1j pin
65536
fBT1
G1IRj bit
Inverse
Return to default output level
When setting to 0,
write 0 by program
j=0 to 7
m : Setting value of the G1POj register
G1IRj bit : Bits in the G1IR register
The above applies under the following conditions.
-The IVL bit in the G1POCRj register is set to 0 ("L" output as a default value) and the INV bit is set to 0
(not inversed).
-Bits UD1 to UD0 are set to 002 (counter increment mode).
(2) The base timer is reset when the base timer matches either following register
(a) G1PO0 (enabled by setting bit RST1 to 1, and bits RST4 and RST2 to 0), or
(b) G1BTRR (enabled by setting bit RST4 to 1, and bits RST2 and RST1 to 0)
FFFF16
n+2
Base timer
m
000016
m
fBT1
OUTC1j pin
n+2-m
fBT1
Inverse
Inverse
n+2
fBT1 Write 0 by program
if setting to 0
G1IRj bit
Inverse
Return to default
output level
j=1 to 7
m : Setting value of the G1POj register
n: Setting value of either G1PO0 register or G1BTRR register
G1IRj bit : Bits in the G1IR register
The above applies under the following conditions.
-The IVL bit in the G1POCRj register is set to 0 ("L" output as a default value) and the INV
bit is set to 0 (not inversed).
-Bits UD1 to UD0 are set to 002 (counter increment mode).
Figure 13.22 Single-phase Waveform Output Mode
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13. Timer S
M16C/29 Group
13.5.2 Phase-Delayed Waveform Output Mode
Output signal level of the OUTC1j pin is inversed every time the base timer value matches the G1POj
register value ( j=0 to 7). Table 13.9 lists specifications of phase-delayed waveform mode. Figure 13.23
shows an example of phase-delayed waveform mode operation.
Table 13.9 Phase-delayed Waveform Output Mode Specifications
Item
Specification
Output waveform
• Free-running operation
(bits RST1, RST2, and RST4 in registers G1BCR1 and G1BCR0 are set to 0
(no reset))
Cycle
:
65536 x 2
fBT1
"H" and "L" width
:
65536
fBT1
• The base timer is cleared to 000016 by matching the base timer with either
following register
(a) G1PO0 register (enabled by setting RST1 bit to 1, and bits RST4 and RST2 to 0), or
(b) G1BTRR register (enabled by setting RST4 bit to 1, and bits RST2 and RST1 to 0)
Cycle
2(n+2)
fBT1
n+2
:
fBT1
:
"H" and "L" width
n : setting value of either G1PO0 register or G1BTRR register
Waveform output start condition
The IFEj bit in the G1FE register is set to 1 (channel j function enabled)
Waveform output stop condition
The IFEj bit is set to 0 (channel j function disabled)
Interrupt request
The G1IRj bit in the interrupt request register is set to 1 when the base timer
value matches the G1POj register value. (See Figure 13.23)
OUTC1j pin
(1)
Pulse signal output pin
Selectable function
• Default value set function: Set starting waveform output level
• Inverse output function : Waveform output signal is inversed and provided
from the OUTC1j pin
NOTE:
1. Pins OUTC10 to OUTC17.
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13. Timer S
M16C/29 Group
(1) Free-running operation
(Bits RST4, RST2, and RST1 in the registers G1BCR0 and G1BCR1 are set to 0)
FFFF16
Base timer
m
000016
65536
fBT1
65536
fBT1
OUTC1j pin
Inverse
Inverse
65536X2
fBT1
Write 0 by program
if setting to 0
G1IRj bit
j=0 to 7
m : Setting value of the G1POj register
G1IRj bit : Bits in the G1IR register
The above applies under the following conditions.
The IVL bit in the G1POCRj register is set to 0 (L output as a default value). The INV bit
is set to 0 (not inversed).
Bits UD1 to UD0 are set to 002 (counter increment mode).
(2) Base timer is reset when the base timer matches either following register
(a) G1PO0 (enabled by setting bit RST1 to 1, and bits RST4 and RST2 to 0), or
(b) G1BTRR (enabled by setting bit RST4 to 1, and bits RST2 and RST1 to 0)
FFFF16
Base timer
n+2
m
000016
m
fBT1
OUTC1j pin
n+2
fBT1
n+2
fBT1
Inverse
Inverse
Write 0 by program
if setting to 0
G1IRj bit
j=1 to 7
m : Setting value of the G1POj register
G1IRj bit : Bits in the G1IR register
n: Setting value of either register G1PO0 or G1BTRR
The above applies under the following conditions.
The IVL bit in the G1POCRj register is set to 0 (L output as a default value).
The INV bit is set to 0 (not inversed).
Bits UD1 to UD0 are set to 002 (counter increment mode).
Figure 13.23 Phase-delayed Waveform Output Mode
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Inverse
2(n+2)
fBT1
13. Timer S
M16C/29 Group
13.5.3 Set/Reset Waveform Output (SR Waveform Output) Mode
Output signal level of the OUTC1j pin becomes high ("H") when the INV bit in the G1POCRi (i=0 to 7) is
set to 0 (output is not reversed) and the base timer value matches the G1POj register value (j=0, 2, 4, 6).
The "H" signal switches to a low-level ("L") signal when the base timer value matches the G1POk (k=j+1)
register value. Table 13.10 lists specifications of SR waveform mode. Figure 13.24 shows an example of
the SR waveform mode operation.
Table 13.10 SR Waveform Output Mode Specifications
Item
Specification
Output waveform
• Free-running operation
(the RST1, RTS2, and RST4 bits of the G1BCR1 and G1BCR0 registers are set
to 0 (no reset))
65536
fBT1
n-m
Inverse level width(1) :
fBT1
• The base timer is cleared to 000016 by matching the base timer with either
Cycle
:
following register
(a) G1PO0 register (enabled by setting RST1 bit to 1, and bits RST4 and RST2 to 0)(2), or
(b) G1BTRR register (enabled by setting RST4 bit to 1, and bits RST2 and RST1 to 0)
Cycle
:
Inverse level width(1) :
p+2
fBT1
n-m
fBT1
m : setting value of the G1POj register (j=0, 2, 4, 6 )
n : setting value of the G1POk register (k=j+1)
p : setting value of the G1PO0 register or G1BTRR register
value range of m, n, p: 000116 to FFFD16
Waveform output start condition
Bits IFEj and IFEk in the G1FE register is set to 1 (channel j function enabled)
Waveform output stop condition
Bits IFEj and IFEk are set to 0 (channel j function disabled)
Interrupt request
The G1IRj bit in the G1IR register is set to 1 when the base timer value
matches the G1POj register value.
The G1IRk bit in the interrupt request register is set to 1 when the base timer
value matches the G1POk register value (See Figure 13.24)
OUTC1j pin (3)
Pulse signal output pin
Selectable function
• Default value set function : Set starting waveform output level
• Inverse output function: Waveform output signal is inversed and provided
from the OUTC1j pin
NOTES:
1. The odd channel's waveform generating register must have greater value than the even channel's.
2. When the G1PO0 register resets the base timer, the channel 0 and channel 1 SR waveform generating functions
are not available.
3. Pins OUTC10, OUTC12, OUTC14, OUTC16.
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13. Timer S
M16C/29 Group
(1) Free-running operation
(Bits RST2 and RST1 in the G1BCR0 register and the RST4 bit in the G1BCR1
register are set to 0)
FFFF16
n
Base timer
m
000016
OUTC1j pin
n-m
fBT1
65536-n+m
fBT1
Inverse
Inverse
Return to default
output level
65536
fBT1
Write 0 by program
if setting to 0
G1IRj bit
inverse
G1IRk bit
j=0, 2, 4, 6 k=j+1
m : Setting value of the G1POj register
n: Setting value of the G1POk register
G1IRj, G1IRk bits: Bits in the G1IR register
The above applies under the following conditions.
The IVL bit in the G1POCRj register is set to 0 (L output as a default value). The INV bit is set to 0
(not inversed).
Bits UD1 and UD0 are set to 002 (counter increment mode).
(2) Base timer is reset when the base timer matches either following register
(a) G1PO0 (enabled by setting bit RST1 to 1, and bits RST4 and RST2 to 0), or
(b) G1BTRR (enabled by setting bit RST4 to 1, and bits RST2 and RST1 to 0)
FFFF16
p+2
n
Base timer
m
000016
n-m
fBT1
p+2-n+m
fBT1
Return to default output level
OUTC1j pin
p+2
fBT1
Write 0 by program
if setting to 0
G1IRj bit
When setting to 0,
write 0 by program
G1IRk bit
j=2, 4, 6 k=j+1
m : Setting value of the G1POj register
n: Setting value of the G1POk register
p: Setting value of either register G1PO0 or G1BTRR
G1IRj, G1IRk bits: Bits in the G1IR register
The above applies under the following conditions.
The IVL bit in the G1POCRj register is set to 0 (L output as a default value). The INV bit is set to 0 (not
inversed).
Bits UD1 and UD0 are set to 002 (counter increment mode).
Figure 13.24 Set/Reset Waveform Output Mode
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13. Timer S
M16C/29 Group
13.6 I/O Port Function Select
The value in the G1FE and G1FS registers decides which IC/OC pin to be an input or output pin.
In SR waveform generating mode, two channels, a set of even channel and odd channel, are used every
output waveform, however, the waveform is output from an even channel only. In this case, the corresponding pin to the odd channel can be used as an I/O port.
Table 13.11 Pin setting for Time Measurement and Waveform Generating Functions
Pin
IFE FSC MOD1 MOD0 Port Direction
Port Data
P27/INPC17/
OUTC17
0
1
1
1
1
X
1
0
0
0
X
X
0
0
1
X
X
0
1
0
Determined by PD27
Determined by PD27, Input to INPC17 is always active
Single-phase Waveform Output
Determined by PD27, SR waveform output mode
Phase-delayed Waveform Output
P27
P27 or INPC17
OUTC17
P27
OUTC17
P26/INPC16/
0
X
X
X
Determined by PD26
P26
OUTC16
1
1
1
1
0
1
1
1
1
0
1
1
1
1
0
1
1
1
1
0
1
1
1
1
0
1
1
1
1
0
1
1
1
1
1
0
0
0
X
1
0
0
0
X
1
0
0
0
X
1
0
0
0
X
1
0
0
0
X
1
0
0
0
X
1
0
0
0
X
0
0
1
X
X
0
0
1
X
X
0
0
1
X
X
0
0
1
X
X
0
0
1
X
X
0
0
1
X
X
0
0
1
X
0
1
0
X
X
0
1
0
X
X
0
1
0
X
X
0
1
0
X
X
0
1
0
X
X
0
1
0
X
X
0
1
0
Determined by PD26, Input to INPC16 is always active
Single-phase Waveform Output
SR Waveform Output
Phase-delayed Waveform Output
Determined by PD25
Determined by PD25, Input to INPC15 is always active
Single-phase Waveform Output
Determined by PD25, SR Waveform Output mode
Phase-delayed Waveform Output
Determined by PD24
Determined by PD24, Input to INPC14 is always active
Single-phase Waveform Output
SR Waveform Output
Phase-delayed Waveform Output
Determined by PD23
Determined by PD23, Input to INPC13 is always active
Single-phase Waveform Output
Determined by PD23, SR waveform output mode
Phase-delayed Waveform Output
Determined by PD22
Determined by PD22, Input to INPC12 is always active
Single-phase Waveform Output
SR Waveform Output
Phase-delayed Waveform Output
Determined by PD21
Determined by PD21, Input to INPC11 is always active
Single-phase Waveform Output
Determined by PD21, SR waveform output mode
Phase-delayed Waveform Output
Determined by PD20
Determined by PD20, Input to INPC10 is always active
Single-phase Waveform Output
SR Waveform Output
Phase-delayed Waveform Output
P26 or INPC16
OUTC16
OUTC16
OUTC16
P25
P25 or INPC15
OUTC15
P25
OUTC15
P24
P24 or INPC14
OUTC14
OUTC14
OUTC14
P23
P23 or INPC13
OUTC13
P23
OUTC13
P22
P22 or INPC12
OUTC12
OUTC12
OUTC12
P21
P21 or INPC11
OUTC11
P21
OUTC11
P20
P20 or INPC10
OUTC10
OUTC10
OUTC10
P25/INPC15/
OUTC15
P24/INPC14/
OUTC14
P23/INPC13/
OUTC13
P22/INPC12/
OUTC12
P21/INPC11/
OUTC11
P20/INPC10/
OUTC10
IFE: IFEj (j=0 to 7) bits in the G1FE register.
FSC: FSCj (j=0 to 7) bits in the G1FS register.
MOD2 to MOD1: Bits in the G1POCRj (j=0 to 7) register.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 168 of 458
13. Timer S
M16C/29 Group
13.6.1 INPC17 Alternate Input Pin Selection
The input capture pin for IC/OC channel 7 can be assigned to one of two package pins. The CH7INSEL
________
bit in the G1BCR0 register selects IC/OC INPC17 from P27/OUTC17/INPC17 or P17/INT5/INPC17/IDU.
________
13.6.2 Digital Debounce Function for Pin P17/INT5/INPC17
________
________
The INT5/INPC17 input from the P17/INT5/INPC17/IDU pin has an effective digital debounce function
against a noise rejection. Refer to 19.6 Digital Debounce function for this detail.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 169 of 458
14.Serial I/O
M16C/29 Group
14. Serial I/O
Note
The SI/O4 interrupt of peripheral function interrupt is not available in the 64-pin package.
Serial I/O is configured with five channels: UART0 to UART2, SI/O3 and SI/O4.
14.1 UARTi (i=0 to 2)
UARTi each have an exclusive timer to generate a transfer clock, so they operate independently of each
other.
Figure 14.1 shows the block diagram of UARTi. Figures 14.2 and 14.3 shows the block diagram of the
UARTi transmit/receive.
UARTi has the following modes:
• Clock synchronous serial I/O mode
• Clock asynchronous serial I/O mode (UART mode).
• Special mode 1 (I2C bus mode): UART2
• Special mode 2: UART2
• Special mode 3 (Bus collision detection function, IEBus mode): UART2
• Special mode 4 (SIM mode): UART2
Figures 14.4 to 14.9 show the UARTi-related registers.
Refer to tables listing each mode for register setting.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 170 of 458
14. Serial I/O
M16C/29 Group
f2SIO
1/2
PCLK1=0
f1SIO or f2SIO
f1SIO
Main clock, PLL clock,
or on-chip oscillator clock
PCLK1=1
1/8
f8SIO
1/4
(UART0)
f32SIO
RxD0
TxD0
Clock source selection
f1SIO or f2SIO
f8SIO
f32SIO
Reception
control circuit
Clock synchronous
type
U0BRG
register
1 / (n0+1)
1/16
UART transmission
Transmission control
Clock synchronous
circuit
type
Clock synchronous type
(when internal clock is selected)
1/2
CKDIR=0
Clock synchronous type
(when external clock is selected)
CKDIR=1
Clock synchronous type
(when internal clock is selected)
External
Receive
clock
Transmit
clock
Transmit/
receive
unit
CKDIR=1
CLK
polarity
reversing
circuit
CTS/RTS selected
CRS=1
CTS0 / RTS0
1/16
CLK1 to CLK0
002
Internal CKDIR=0
012
102
CKPOL
CLK0
UART reception
CTS/RTS disabled
RTS0
VCC
CRS=0
CTS/RTS disabled
CRD=1
RCSP=0
CTS0
CRD=0
CTS0 from UART1
RCSP=1
(UART1)
RxD1
TxD1
Clock source selection
CLK1 to CLK0
002
f1SIO or f2SIO
Internal CKDIR=0
012
f8SIO
102
f32SIO
External
1/16
1 / (n1+1)
CTS1 / RTS1/
CTS0/ CLKS1
CLKMD0=0
Clock output
pin select
CLKMD1=1
Transmit
clock
Transmit/
receive
unit
Clock synchronous type
1/2 (when internal clock is selected)
CKDIR=0
Clock synchronous type
(when external clock is selected)
CKDIR=1
Clock synchronous type
(when internal clock is selected)
CTS/RTS selected
CRS=1
CRS=0
CTS/RTS disabled
RTS1
VCC
CTS/RTS disabled
RCSP=0
CRD=1
CTS1
CRD=0
CTS0 from UART0
RCSP=1
TxD
polarity
reversing
circuit
RxD polarity
reversing circuit
Clock source selection
CLK1 to CLK0
002
f1SIO or f2SIO
012
Internal CKDIR=0
f8SIO
102
1/16
External
1 / (n2+1)
CKPOL
CLK
polarity
reversing
circuit
CTS/RTS
selected
CRS=1
CRS=0
CKDIR=1
UART reception
Clock synchronous
type
U2BRG
register
f32SIO
1/16
Clock synchronous
type
CTS/RTS disabled
RTS2
VCC
CTS2
CRD=0
i = 0 to 2
ni: Values set to the UiBRG register
SMD2 to SMD0, CKDIR: Bists in the UiMR register
CLK1 to CLK0, CKPOL, CRD, CRS: Bits in the UiC0 register
CLKMD0, CLKMD1, RCSP: Bits in the UCON register
Figure 14.1 Block diagram of UARTi (i = 0 to 2)
page 171 of 458
Reception
control circuit
UART transmission
Clock synchronous type
1/2 (when internal clock is selected)
CKDIR=0
Clock synchronous type
(when external clock is selected)
CKDIR=1
Clock synchronous type
(when internal clock is selected)
CTS/RTS disabled
CRD=1
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
Receive
clock
CLKMD0=1
CLKMD1=0
RxD2
CTS2 / RTS2
Transmission
control circuit
Clock synchronous
type
(UART2)
CLK2
UART transmission
1/16
CKDIR=1
CLK
polarity
reversing
circuit
Reception
control circuit
Clock synchronous
type
U1BRG
register
CKPOL
CLK1
UART reception
Transmission
control circuit
Receive
clock
Transmit
clock
Transmit/
receive
unit
TxD2
14.Serial I/O
M16C/29 Group
Clock
synchronous type
PAR
disabled
1SP
STPS=0
RxDi
PRYE=0
SP
2SP
SP
UART (7 bits)
UART (8 bits)
Clock
synchronous
type
UARTi receive register
UART (7 bits)
PAR
STPS=1
PAR PRYE=1
enabled
UART
UART (9 bits)
Clock
synchronous type
UART (8 bits)
UART (9 bits)
0
0
0
0
0
0
0
D8
D7
D6
D5
D4
D3
D2
D1
D0
UARTi receive
buffer register
Address 03A616
Address 03A716
Address 03AE16
Address 03AF16
MSB/LSB conversion circuit
Data bus high-order bits
Data bus low-order bits
MSB/LSB conversion circuit
D7
D8
D6
D5
D4
D3
D2
D1
UART (9 bits)
SP
2SP STPS=1
SP
PAR
STPS=0
1SP
Clock synchronous
type
PRYE=1 UART
TxDi
PRYE=0 Clock
PAR
disabled
UARTi transmit
buffer register
Address 03A216
Address 03A316
Address 03AA16
Address 03AB16
UART (8 bits)
UART (9 bits)
PAR
enabled
D0
synchronous
type
0
UART (7 bits)
UART (7 bits)
UART (8 bits)
UARTi transmit register
SP: Stop bit
PAR: Parity bit
Clock synchronous
type
SMD2 to SMD0, STPS, PRYE, IOPOL, CKDIR : Bits in the UiMR
Figure 14.2 Block diagram of UARTi (i = 0, 1) transmit/receive unit
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
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14. Serial I/O
M16C/29 Group
No reverse
IOPOL=0
RxD data
reverse circuit
RxD2
IOPOL=1
Reverse
Clock
synchronous type
PAR
disabled
1SP
STPS=0
PRYE=0
SP
2SP
SP
UARTi receive register
UART(7 bits)
PAR
STPS=1
PRYE=1
PAR
enabled
0
UART
(7 bits)
UART
(8 bits)
Clock
synchronous
type
0
0
UART
0
0
Clock
synchronous type
UART
(9 bits)
0
0
UART
(8 bits)
UART
(9 bits)
D8
D7
D6
D5
D4
D3
D2
D1
D0
Logic reverse circuit + MSB/LSB conversion circuit
UART2 receive
buffer register
Address 037E16
Address 037F16
Data bus high-order bits
Data bus low-order bits
Logic reverse circuit + MSB/LSB conversion circuit
D7
D8
D6
D5
D4
D3
D2
D1
D0
UART2 transmit
buffer register
Address 037A16
Address 037B16
UART
(8 bits)
UART
(9 bits)
2SP
SP
STPS=1
SP
PAR
enabled
UART
(9 bits)
Clock
synchronous type
PAR
STPS=0
1SP
PRYE=1 UART
PRYE=0 Clock
PAR
disabled
synchronous
type
0
UART
(7 bits)
UART
(8 bits)
UART(7 bits)
Clock
synchronous type
UARTi transmit register
Error signal output
U2ERE disable
IOPOL No reverse
=0
=0
TxD data
Error signal
reverse circuit
output circuit
IOPOL
U2ERE
Reverse
Error signal output
=1
=1
enable
TxD2
SP: Stop bit
PAR: Parity bit
SMD2 to SMD0, STPS, PRYE, IOPOL, CKDIR : Bits in the U2MR register
U2ERE : Bits in the U2C1 register
Figure 14.3 Block diagram of UART2 transmit/receive unit
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 173 of 458
14.Serial I/O
M16C/29 Group
UARTi Transmit Buffer Register (i=0 to 2)(1)
(b15)
b7
(b8)
b0 b7
b0
Symbol
U0TB
U1TB
U2TB
Address
03A3 16-03A2 16
03AB 16-03AA 16
037B 16-037A 16
After Reset
Undefined
Undefined
Undefined
Function
RW
Transmit data
WO
Nothing is assigned. If necessary, set to 0.
When read, their contents are undefined
NOTES:
1. Use MOV instruction to write to this register.
UARTi Receive Buffer Register (i=0 to 2)
(b15)
b7
(b8)
b0 b7
b0
Bit
Symbol
Symbol
U0RB
U1RB
U2RB
Address
03A7 16-03A6 16
03AF 16-03AE 16
037F 16-037E 16
After Reset
undefined
undefined
undefined
Function
Bit Name
(b7-b0)
(b8)
RW
Receive data (D7 to D0)
RO
Receive data (D8)
RO
Nothing is assigned. If necessary, set to 0.
(b10-b9) When read, their contents are undefined
ABT
Arbitration lost
detecting flag (2)
0 : Not detected
1 : Detected
RW
OER
Overrun error flag(1)
0 : No overrun error
1 : Overrun error found
RO
FER
Framing error flag(1)
0 : No framing error
1 : Framing error found
RO
PER
Parity error flag(1)
0 : No parity error
1 : Parity error found
RO
SUM
Error sum flag (1)
0 : No error
1 : Error found
RO
NOTES:
1. When the SMD2 to SMD0 bits in the UiMR register are set to 0002 (serial I/O disabled) or the RE bit in the UiC1 register is set to
0 (reception disabled), all bits SUM, PER, FER and OER are set to 0 (no error). The SUM bit is set to 0 (no error) when all of the
PER, FER and OER bits are set to 0 (no error). Also, bits PER and FER are set to 0 by reading the lower byte of the UiRB
register.
2. The ABT bit is set to 0 by setting to 0 by program. (Writing 1 has no effect.) Nothing is assigned at the bit 11 in the U0RB and
U1RB registers. If necessary, set to 0. When read, its content is 0.
UARTi Baud Rate Generation Register (i=0 to 2)(1, 2, 3)
b7
b0
Symbol
U0BRG
U1BRG
U2BRG
Address
03A116
03A916
037916
After Reset
Undefined
Undefined
Undefined
Function
Assuming that set value = n, UiBRG divides
the count source by n + 1
Setting Range
RW
0016 to FF16
WO
NOTES:
1. Write to this register while serial I/O is neither transmitting nor receiving.
2. Use MOV instruction to write to this register.
The transfer clock is shown below when the setting value in the UiBRG register is set as n.
(1) When the CKDIR bit in the UiMR register to 0 (internal clock)
• Clock synchronous serial I/O mode
: fj/(2(n+1))
• Clock asynchronous serial I/O (UART) mode : fj/(16(n+1))
(2) When the CKDIR bit in the UiMR register to 1 (external clock)
• Clock synchronous serial I/O mode
: f EXT
• Clock asynchronous serial I/O (UART) mode : f EXT/(16(n+1))
fj : f1SIO, f2SIO, f8SIO, f32SIO
fEXT : Input from CLKi pin
3. Set the UiBRG register after setting bits CLK1 and CLK0 in the registers UiC0.
Figure 14.4 U0TB to U2TB, U0RB to U2RB, U0BRG to U2BRG Registers
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 174 of 458
14. Serial I/O
M16C/29 Group
UARTi Transmit/receive Mode Register (i=0, 1)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
U0MR, U1MR
0
Address
03A016, 03A816
Bit
Symbol
Bit Name
SMD0
Serial I/O mode select bit
(2)
SMD1
SMD2
After Reset
0016
Function
b2 b1 b0
0 0 0 : Serial I/O disabled
0 0 1 : Clock synchronous serial I/O mode
1 0 0 : UART mode transfer data 7 bit long
1 0 1 : UART mode transfer data 8 bit long
1 1 0 : UART mode transfer data 9 bit long
Do not set the value other than the above
CKDIR
Internal/external clock
select bit
0 : Internal clock
1 : External clock
STPS
Stop bit length select bit
0 : One stop bit
1 : Two stop bits
PRY
Odd/even parity select bit Effective when PRYE = 1
0 : Odd parity
1 : Even parity
PRYE
(b7)
RW
RW
RW
RW
RW
(1)
RW
RW
Parity enable bit
0 : Parity disabled
1 : Parity enabled
RW
Reserve bit
Set to 0
RW
NOTES:
1. Set the corresponding port direction bit for each CLKi pin to 0 (input mode).
2. To receive data, set the corresponding port direction bit for each RxDi pin to 0.
UART2 Transmit/receive Mode Register
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
U2MR
Address
037816
Bit
Symbol
Bit Name
SMD0
Serial I/O mode select bit
(2)
SMD1
SMD2
After Reset
0016
Function
b2 b1 b0
0 0 0 : Serial I/O disabled
0 0 1 : Clock synchronous serial I/O mode
0 1 0 : I2C bus mode(3)
1 0 0 : UART mode transfer data 7 bit long
1 0 1 : UART mode transfer data 8 bit long
1 1 0 : UART mode transfer data 9 bits long
Do not set the value other than the above
CKDIR
Internal/external clock
select bit
0 : Internal clock
1 : External clock
STPS
Stop bit length select bit
0 : One stop bit
1 : Two stop bits
PRY
Odd/even parity select bit Effective when PRYE = 1
(1)
0 : Odd parity
1 : Even parity
RW
RW
RW
RW
RW
RW
PRYE
Parity enable bit
0 : Parity disabled
1 : Parity enabled
RW
IOPOL
TxD, RxD I/O polarity
reverse bit
0 : No reverse
1 : Reverse
RW
NOTES:
1. Set the corresponding port direction bit for each CLK2 pin to 0 (input mode).
2. To receive data, set the corresponding port direction bit for each RxD2 pin to 0 (input mode).
3. Set the corresponding port direction bit for SCL2 and SDA2 pins to 0 (input mode).
Figure 14.5 U0MR to U2MR Registers
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
RW
page 175 of 458
14.Serial I/O
M16C/29 Group
UARTi Transmit/receive Control Rregister 0 (i=0 to 2)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
U0C0 to U2C0
Bit
Symbol
Address
03A416, 03AC16, 037C16
After Reset
00001000 2
Bit Name
CLK0
BRG count source
select bit(7)
CLK1
Function
RW
b1 b0
RW
0 0 : f1SIO or f2SIO is selected
0 1 : f8SIO is selected
1 0 : f32SIO is selected
1 1 : Do not set
RW
CRS
CTS/RTS function
select bit (3)
Effective when CRD is set to 0
0 : CTS function is selected (1)
1 : RTS function is selected
RW
TXEPT
Transmit register empty
flag
0 : Data present in transmit register (during transmission)
1 : No data present in transmit register
(transmission completed)
RO
CRD
CTS/RTS disable bit
0 : CTS/RTS function enabled
1 : CTS/RTS function disabled
(P60, P6 4 and P7 3 can be used as I/O ports)(6)
RW
NCH
Data output select bit(5)
0 : TxD2/SDA2 and SCLi pins are CMOS output
RW
1 : TxD2/SDA2 and SCLi pins are N-channel open-drain output(4)
CLK polarity select bit
0 : Transmit data is output at falling edge of transfer clock
and receive data is input at rising edge
1 : Transmit data is output at rising edge of transfer clock
and receive data is input at falling edge
CKPOL
UFORM Transfer format select bit 0 : LSB first
(2)
1 : MSB first
RW
RW
NOTES:
1. Set the corresponding port direction bit for each CTSi pin to 0 (input mode).
2. Effective when bits SMD2 to SMD0 in the UMR register to 0012 (clock synchronous serial I/O mode) or 0102 (UART mode transfer
data 8 bits long). Set the UFORM bit to 1 when bits SMD2 to SMD0 are set to 1012 (I2C bus mode) and 0 when they are set to 1002.
3. CTS1/RTS1 can be used when the CLKMD1 bit in the UCON register is set to 0 (only CLK1 output) and the RCSP bit in the UCON
register is set to 0 (CTS0/RTS0 not separated).
4. SDA2 and SCL2 are effective when i = 2.
5. When bits SMD2 to SMD in the UiMR regiser are set to 0002 (serial I/O disable), do not set NCH bit to 1 (TxDi/SDA2 and SCL2 pins
are N-channel open-drain output).
6. When the U1MAP bit in PACR register is 1 (P73 to P70), P70 functions as CTS/RTS pin in UART1.
7. When the CLK1 and CLK0 bit settings are changed, set the UiBRG register.
UART Transmit/receive Control Register 2
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
UCON
Bit
Symbol
Address
03B016
After Reset
X00000002
Bit Name
Function
U0IRS
UART0 transmit interrupt 0 : Transmit buffer empty (Tl = 1)
cause select bit
1 : Transmission completed (TXEPT = 1)
RW
U1IRS
UART1 transmit
interrupt cause select
0 : Transmit buffer empty (Tl = 1)
1 : Transmission completed (TXEPT = 1)
RW
U0RRM UART0 continuous
receive mode enable bit
0 : Continuous receive mode disabled
1 : Continuous receive mode enable
RW
U1RRM UART1 continuous
receive mode enable bit
0 : Continuous receive mode disabled
1 : Continuous receive mode enabled
RW
CLKMD0 UART1 CLK/CLKS
select bit 0
Effective when the CLKMD1 bit is set to 1
0 : Clock output from CLK1
1 : Clock output from CLKS1
RW
CLKMD1 UART1 CLK/CLKS
select bit 1 (1)
0 : Output from CLK1 only
1 : Transfer clock output from multiple pins function selected RW
RCSP
(b7)
Separate UART0
CTS/RTS bit
(2)
0 : CTS/RTS shared pin
1 : CTS/RTS separated (P64 pin functions as CTS0 pin )
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined
NOTES:
1. When using multiple transfer clock output pins, make sure the following conditions are met:set the CKDIR bit in the U1MR
register to 0 (internal clock)
2. When the U1MAP bit in PACR register is set to 1 (P73 to P70), P70 pin functions as CTS0 pin.
Figure 14.6 U0C0 to U2C0 and UCON Registers
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
RW
page 176 of 458
RW
14. Serial I/O
M16C/29 Group
UARTi Transmit/receive Control Register 1 (i=0, 1)
b7
b6
b5
b4
b3
b2
b1
Symbol
U0C1, U1C1
b0
Bit
Symbol
Address
03A516,03AD 16
After Reset
00000010 2
Function
Bit Name
RW
TE
Transmit enable bit
0 : Transmission disabled
1 : Transmission enabled
RW
TI
Transmit buffer
empty flag
0 : Data present in UiTB register
1 : No data present in UiTB register
RO
RE
Receive enable bit
0 : Reception disabled
1 : Reception enabled
RW
RI
Receive complete flag
0 : No data present in UiRB register
1 : Data present in UiRB register
RO
(b7-b4)
Nothing is assigned.
If necessary, set to 0. When read, the content is 0
UART2 Transmit/receive Control Register 1
b7
b6
b5
b4
b3
b2
b1
Symbol
U2C1
b0
Bit
Symbol
Address
037D 16
After Reset
00000010 2
Function
Bit Name
RW
TE
Transmit enable bit
0 : Transmission disabled
1 : Transmission enabled
RW
TI
Transmit buffer
empty flag
0 : Data present in U2TB register
1 : No data present in U2TB register
RO
RE
Receive enable bit
0 : Reception disabled
1 : Reception enabled
RW
RI
Receive complete flag
0 : No data present in U2RB register
1 : Data present in U2RB register
RO
UART2 transmit interrupt
cause select bit
0 : Transmit buffer empty (TI = 1)
1 : Transmit is completed (TXEPT = 1)
RW
U2RRM UART2 continuous
receive mode enable bit
0 : Continuous receive mode disabled
1 : Continuous receive mode enabled
RW
U2LCH Data logic select bit
0 : No reverse
1 : Reverse
RW
U2ERE Error signal output
enable bit
0 : Output disabled
1 : Output enabled
RW
U2IRS
Pin Assignment Control Register (1)
b7
b6
b5
b4
b3
b2
b1
b0
Symbpl
PACR
Bit Symbol
Address
025D 16
Bit Name
PACR0
PACR1
Pin enabling bit
PACR2
After Reset
0016
Function
010 : 64 pin
011 : 80 pin
All other values are reserved. Do
not use.
RW
RW
RW
RW
Nothing is assigned.
(b6-b3)
Reserved bits
U1MAP
UART1 pin remapping bit
If necessary, set to 0. When
read, the content is 0
UART1 pins assigned to
0 : P6 7 to P6 4
1 : P7 3 to P7 0
RW
NOTE:
1. Set the PACR register by the next instruction after setting the PRC2 bit in the PRCR register to 1(write enable).
Figure 14.7 U0C1 to U2C1 Register, and PACR Register
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14.Serial I/O
M16C/29 Group
UART2 Special Mode Register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
U2SMR
0
Bit
Symbol
Address
0377 16
After Reset
X0000000 2
Function
Bit Name
RW
IICM
I2C bus mode select bit
0 : Other than I2C bus mode
1 : I2C bus mode
RW
ABC
Arbitration lost detecting
flag control bit
0 : Update per bit
1 : Update per byte
RW
BBS
Bus busy flag
0 : STOP condition detected
1 : START condition detected (busy)
RW
(b3)
Reserved bit
Set to 0
RW
ABSCS
Bus collision detect
sampling clock select bit
0 : Rising edge of transfer clock
1 : Underflow signal of timer A0
RW
ACSE
Auto clear function
select bit of transmit
enable bit
0 : No auto clear function
1 : Auto clear at occurrence of bus collision
RW
SSS
Transmit start condition
select bit
0 : Not synchronized to RxD2
1 : Synchronized to RxD2(2)
RW
(1)
Nothing is assigned. If necessary, set to 0. When read, the content is undefined
(b7)
NOTES:
1: The BBS bit is set to 0 by writing 0 by program. (Writing 1 has no effect).
2: When a transfer begins, the SSS bit is set to 0 (Not synchronized to RxD2).
UART2 Special Mode Register 2
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
U2SMR2
Bit
Symbol
Address
0376 16
Bit Name
Function
RW
IICM2
I2 C bus mode select bit 2
Refer to Table 14.13
CSC
Clock-synchronous bit
0 : Disabled
1 : Enabled
RW
SWC
SCL2 wait output bit
0 : Disabled
1 : Enabled
RW
ALS
SDA2 output stop bit
0 : Disabled
1 : Enabled
RW
STAC
UART initialization bit
0 : Disabled
1 : Enabled
RW
SWC2
SCL2 wait output bit 2
0: Transfer clock
1: “L” output
RW
SDHI
SDA2 output disable bit
0: Enabled
1: Disabled (high impedance)
RW
(b7)
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined
Figure 14.8 U2SMR and U2SMR2 Registers
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
After Reset
X0000000 2
page 178 of 458
RW
14. Serial I/O
M16C/29 Group
UART2 Special Mode Register 3
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
U2SMR3
Bit
Symbol
Address
0375 16
After Reset
000X0X0X 2
Bit Name
Function
RW
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined
(b0)
CKPH
Clock phase set bit
0 : Without clock delay
1 : With clock delay
RW
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined
(b2)
NODC
Clock output select bit
0 : CLK2 is CMOS output
1 : CLK2 is N-channel open drain output
RW
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined
(b4)
DL0
SDA2 digital delay
setup bit
(1, 2)
DL1
DL2
b7 b6 b5
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0 : Without delay
1 : 1 to 2 cycle(s) of U2BRG count source
0 : 2 to 3 cycles of U2BRG count source
1 : 3 to 4 cycles of U2BRG count source
0 : 4 to 5 cycles of U2BRG count source
1 : 5 to 6 cycles of U2BRG count source
0 : 6 to 7 cycles of U2BRG count source
1 : 7 to 8 cycles of U2BRG count source
RW
RW
RW
NOTES:
1. Bits DL2 to DL0 are used to generate a delay in SDA output by digital means during I2C bus mode. In other than I2C bus
mode,set these bits to 0002 (no delay).
2. The amount of delay varies with the load on pins SCL2 and SDA2. Also, when using an external clock, the amount of
delay increases by about 100 ns.
UART2 Special Mode Register 4
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
U2SMR4
Bit
Symbol
Address
0374 16
Bit Name
Function
RW
Start condition
generate bit (1)
0 : Clear
1 : Start
RW
Restart condition
generate bit (1)
0 : Clear
1 : Start
RW
STPREQ
Stop condition
generate bit (1)
0 : Clear
1 : Start
RW
STSPSEL
SCL2,SDA 2 output
select bit
0 : Start and stop conditions not output
1 : Start and stop conditions output
RW
ACKD
ACK data bit
0 : ACK
1 : NACK
RW
ACKC
ACK data output
enable bit
0 : Serial I/O data output
1 : ACK data output
RW
SCLHI
SCL2 output stop
enable bit
0 : Disabled
1 : Enabled
RW
SWC9
SCL2 wait bit 3
0 : SCL 2 “L” hold disabled
1 : SCL 2 “L” hold enabled
RW
STAREQ
RSTAREQ
NOTE:
1. Set to 0 when each condition is generated.
Figure 14.9 U2SMR3 and U2SMR4 Registers
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After Reset
0016
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14.Serial I/O
M16C/29 Group
14.1.1 Clock Synchronous serial I/O Mode
The clock synchronous serial I/O mode uses a transfer clock to transmit and receive data. Table 14.1
lists the specifications of the clock synchronous serial I/O mode. Table 14.2 lists the registers used in
clock synchronous serial I/O mode and the register values set.
Table 14.1 Clock Synchronous Serial I/O Mode Specifications
Item
Transfer data format
Transfer clock
Transmission, reception control
Transmission start condition
Specification
• Transfer data length: 8 bits
• The CKDIR bit in the UiMR(i=0 to 2) register is set to 0 (internal clock) : fj/ (2(n+1))
fj = f1SIO, f2SIO, f8SIO, f32SIO. n: Setting value of UiBRG register
0016 to FF16
• CKDIR bit is set to 1 (external clock ) : Input from CLKi pin
_______
_______
_______ _______
• Selectable from CTS function, RTS function or CTS/RTS function disable
• Before transmission can start, the following requirements must be met (1)
_ The TE bit in the UiC1 register is set to 1 (transmission enabled)
_ The TI bit in the UiC1 register is set to 0 (data present in UiTB register)
_
Reception start condition
Interrupt request
generation timing
Error detection
Select function
_______
_______
If CTS function is selected, input on the CTSi pin is set to “L”
• Before reception can start, the following requirements must be met (1)
_ The RE bit in the UiC1 register is set to 1 (reception enabled)
_ The TE bit in the UiC1 register is set to 1 (transmission enabled)
_ The TI bit in the UiC1 register is set to 0 (data present in the UiTB register)
• For transmission, one of the following conditions can be selected
_ The UiIRS bit (3) is set to 0 (transmit buffer empty): when transferring data from the
UiTB register to the UARTi transmit register (at start of transmission)
_ The UiIRS bit is set to 1 (transfer completed): when the serial I/O finished sending
data from the UARTi transmit register
• For reception
When transferring data from the UARTi receive register to the UiRB register (at
completion of reception)
• Overrun error (2)
This error occurs if the serial I/O started receiving the next data before reading the
UiRB register and received the 7th bit in the the next data
• CLK polarity selection
Transfer data input/output can be chosen to occur synchronously with the rising or
the falling edge of the transfer clock
• LSB first, MSB first selection
Whether to start sending/receiving data beginning with bit 0 or beginning with bit 7
can be selected
• Continuous receive mode selection
Reception is enabled immediately by reading the UiRB register
• Switching serial data logic (UART2)
This function reverses the logic value of the transmit/receive data
• Transfer clock output from multiple pins selection (UART1)
The output pin can be selected in a program from two UART1 transfer clock pins that
have been set
_______ _______
• Separate CTS/RTS pins (UART0)
_________
_________
CTS0 and RTS0 are input/output from separate pins
• UART1 pin remapping selection
The UART1 pin can be selected from the P67 to P64 or P73 to P70
NOTES:
1. When an external clock is selected, the conditions must be met while if the CKPOL bit in the UiC0 register is set to 0
(transmit data output at the falling edge and the receive data taken in at the rising edge of the transfer clock), the external
clock is in the high state; if the CKPOL bit in the UiC0 register is set to 1 (transmit data output at the rising edge and the
receive data taken in at the falling edge of the transfer clock), the external clock is in the low state.
2. If an overrun error occurs, bits 8 to 0 in the UiRB register are undefined. The IR bit in the SiRIC register remains unchanged.
3. The U0IRS and U1IRS bits respectively are the bits 0 and 1 in the UCON register; the U2IRS bit is bit 4 in the U2C1 register.
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14. Serial I/O
M16C/29 Group
Table 14.2 Registers to Be Used and Settings in Clock Synchronous Serial I/O Mode
Register
Bit
Function
UiTB(3)
0 to 7
Set transmission data
UiRB(3)
0 to 7
Reception data can be read
OER
Overrun error flag
UiBRG
0 to 7
Set bit rate
UiMR(3)
SMD2 to SMD0
Set to 0012
CKDIR
Select the internal clock or external clock
UiC0
UiC1
IOPOL(i=2) (4)
Set to 0
CLK1 to CLK0
Select the count source for the UiBRG register
CRS
Select CTS or RTS to use
TXEPT
Transmit register empty flag
CRD
Enable or disable the CTS or RTS function
NCH
Select TxDi pin output mode
_______
_______
Select the transfer clock polarity
UFORM
Select the LSB first or MSB first
TE
Set this bit to 1 to enable transmission/reception
TI
Transmit buffer empty flag
RE
Set this bit to 1 to enable reception
U2IRS
Reception complete flag
(1)
Select the source of UART2 transmit interrupt
U2RRM (1)
U2LCH
(3)
Set this bit to 1 to use UART2 continuous receive mode
Set this bit to 1 to use UART2 inverted data logic
U2ERE (3)
Set to 0
U2SMR
0 to 7
Set to 0
U2SMR2
0 to 7
Set to 0
U2SMR4
UCON
_______
CKPOL
RI
U2SMR3
_______
0 to 2
Set to 0
NODC
Select clock output mode
4 to 7
Set to 0
0 to 7
Set to 0
U0IRS, U1IRS
Select the source of UART0/UART1 transmit interrupt
U0RRM, U1RRM
Set this bit to 1 to use continuous receive mode
CLKMD0
Select the transfer clock output pin when CLKMD1 is set to 1
CLKMD1
Set this bit to 1 to output UART1 transfer clock from two pins
RCSP
Set this bit to 1 to accept as input the UART0 CTS0 signal from the P64 pin
7
Set to 0
_________
NOTES:
1. Set bits 5 and 4 in registers U0C1 and U1C1 to 0. Bits U0IRS, U1IRS, U0RRM, and U1RRM are in the
UCON register.
2. Not all register bits are described above. Set those bits to 0 when writing to the registers in clock
synchronous serial I/O mode.
3. Set bits 7 and 6 in registers U0C1 and U1C1 to 0.
4. Set the bit 7 in registers U0MR and U1MR to 0.
i=0 to 2
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14.Serial I/O
M16C/29 Group
Table 14.3 lists pin functions for the case where the multiple transfer clock output pin select function is
deselected. Table 14.4 lists the P64 pin functions during clock synchronous serial I/O mode.
Note that for a period from when the UARTi operation mode is selected to when transfer starts, the TxDi
pin outputs an “H”. (If the N-channel open-drain output is selected, this pin is in a high-impedance state.)
Table 14.3 Pin Functions (When Not Select Multiple Transfer Clock Output Pin Function)(1)
Method of Selection
Function
Pin Name
TxDi (i = 0 to 2) Serial data output
(P63, P6 7, P70)
(Outputs dummy data when performing reception only)
Serial data input
RxDi
(P6 2, P6 6, P71)
Set the PD6_2 bit and PD6_6 bit in the PD6 register, and PD7_1 bit in the PD7
register to 0 (Can be used as an input port when performing transmission only)
CLKi
Transfer clock output
(P61, P6 5, P72)
Transfer clock input
Set the CKDIR bit in the UiMR register to 0
CTSi/RTSi
CTS input
(P60, P6 4, P73)
Set the CRD bit in the UiC0 register to 0
Set the CRS bit in the UiC0 register to 0
Set the PD6_0 bit and PD6_4 bit in the PD6 register is set to 0, the PD7_3 bit
in the PD7 register to 0
Set the CKDIR bit in the UiMR register to 1
Set the PD6_1 bit and PD6_5 bit in the PD6 register, and the PD7_2 bit in the
PD7 register to 0
RTS output
Set the CRD bit in the UiC0 register to 0
Set the CRS bit in the UiC0 register to 1
I/O port
Set the CRD bit in the UiC0 register to 1
NOTE:
1: When the U1MAP bit in PACR register is 1 (P73 to P70), UART1 pin is assgined to P73 to P70.
Table 14.4 P64 Pin Functions(1)
Bit Set Value
Pin Function
P64
CTS1
RTS1
CTS0(2)
CLKS1
U1C0 register
CRS
CRD
1
0
0
0
1
0
0
RCSP
0
0
0
1
UCON register
CLKMD1 CLKMD0
0
0
0
0
1(3)
PD6 register
PD6_4
Input: 0, Output: 1
0
0
1
NOTES:
1. When the U1MAP bit in PACR register is 1 (P73 to P70), this table lists the P70 functions.
2. In addition to this, set the CRD bit in the U0C0 register to 0 (CT00/RT00 enabled) and the CRS bit in the
U0C0 register to 1 (RTS0 selected).
3. When the CLKMD1 bit is set to 1 and the CLKMD0 bit is set to 0, the following logic levels are output:
• High if the CLKPOL bit in the U1C0 register is set to 0
• Low if the CLKPOL bit in the U1C0 register is set to 1
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14. Serial I/O
M16C/29 Group
(1) Example of Transmit Timing (Internal clock is selected)
Tc
Transfer clock
UiC1 register
TE bit
UiC1 register
TI bit
CTSi
1
0
Write data to the UiTB register
1
0
Transferred from UiTB register to UARTi transmit register
“H”
TCLK
“L”
Stopped pulsing because CTSi = “H”
Stopped pulsing because the TE bit = 0
CLKi
TxDi
D0 D1 D2 D3 D4 D5 D6 D7
UiC0 register
TXEPT bit
1
SiTIC register
IR bit
1
D0 D 1 D2 D3 D4 D5 D6 D7
D0 D1 D 2 D 3 D4 D5 D6 D7
0
0
Cleared to “0” when interrupt request is accepted, or cleared to 0 by program
Tc = TCLK = 2(n + 1) / fj
fj: frequency of UiBRG count source (f 1SIO, f2SIO, f8SIO, f32SIO)
n: value set to UiBRG register
i: 0 to 2
The above timing diagram applies to the case where the register bits are set as follows:
• The CKDIR bit in the UiMR register is set to 0 (internal clock)
• The CRD bit in the UiC0 register is set to 0 (CTS/RTS enabled); CRS bit is set to 0 (CTS selected)
• The CKPOL bit in the UiC0 register is set to 0 (transmit data output at the falling edge and receive data taken in at the rising edge of the
transfer clock)
• The UiIRS bit is set to 0 (an interrupt request occurs when the transmit buffer becomes empty): U0IRS bit is the bit 0 in the UCON register
U1IRS bit is the bit 1 in the UCON register, and U2IRS bit is the bit 4 in the U2C1 register.
(2) Example of Receive Timing (External clock is selected)
1
UiC1 register
RE bit
0
UiC1 register
TE bit
0
UiC1 register
TI bit
RTSi
1
Write dummy data to UiTB register
1
0
Transferred from UiTB register to UARTi transmit register
“H”
“L”
1 / fEXT
Even if the reception is completed, the RTS
does not change. The RTS becomes “L”
when the RI bit changes to 0 from 1.
CLKi
Receive data is taken in
D0 D 1 D2 D3 D4 D 5 D6 D7
RxDi
UiC1 register
RI bit
1
SiRIC register
IR bit
1
Transferred from UARTi receive register
to UiRB register
D0 D1 D2
D3 D 4 D5
Read out from UiRB register
0
0
Cleared to 0 when interrupt request is
accepted, or cleared to 0 by program
The above timing diagram applies to the case where the register bits are set
Make sure the following conditions are met when input
as follows:
to the CLKi pin before receiving data is high:
• The CKDIR bit in the UiMR register is set to 1 (external clock)
• UiC0 register TE bit is set to 1 (transmit enabled)
• The CRD bit in the UiC0 register is set to 0 (CTS/RTS enabled);
• UiC0 register RE bit is set to 1 (Receive enabled)
The CRS bit is set to 1 (RTS selected)
• Write dummy data to the UiTB register
• UiC0 register CKPOL bit is set to 0 (transmit data output at the falling edge and
receive data taken in at the rising edge of the transfer clock)
fEXT: frequency of external clock
Figure 14.10 Typical transmit/receive timings in clock synchronous serial I/O mode
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14.Serial I/O
M16C/29 Group
14.1.1.1 Counter Measure for Communication Error Occurs
If a communication error occurs while transmitting or receiving in clock synchronous serial I/O mode,
follow the procedures below.
•Resetting the UiRB register (i=0 to 2)
(1) Set the RE bit in the UiC1 register to 0 (reception disabled)
(2) Set bits SMD2 to SMD0 in the UiMR register to 0002 (Serial I/O disabled)
(3) Set bits SMD2 to SMD0 in the UiMR register to 0012 (Clock synchronous serial I/O mode)
(4) Set the RE bit in the UiC1 register to 1 (reception enabled)
•Resetting the UiTB register (i=0 to 2)
(1) Set bits SMD2 to SMD0 in the UiMR register to 0002 (Serial I/O disabled)
(2) Set bits SMD2 to SMD0 in the UiMR register to 0012 (Clock synchronous serial I/O mode)
(3) 1 is written to TE bit in the UiC1 register (reception enabled), regardless to the TE bit.
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14. Serial I/O
M16C/29 Group
14.1.1.2 CLK Polarity Select Function
Use the CKPOL bit in the UiC0 register (i=0 to 2) to select the transfer clock polarity. Figure 14.11
shows the polarity of the transfer clock.
(1) When the CKPOL bit in the UiC0 register is set to 0 (transmit data output at the falling edge
and the receive data taken in at the rising edge of the transfer clock)
CLKi
(2)
TXD i
D0
D1
D2
D3
D4
D5
D6
D7
RX Di
D0
D1
D2
D3
D4
D5
D6
D7
(2) When the CKPOL bit in the UiC0 register is set to 1 (transmit data output at the rising
edge and the receive data taken in at the falling edge of the transfer clock)
(3)
CLKi
TXD i
D0
D1
D2
D3
D4
D5
D6
D7
RX Di
D0
D1
D2
D3
D4
D5
D6
D7
i = 0 to 2
NOTES:
1. This applies to the case where the UFORM bit in the UiC0 register is set to 0 (LSB first) and the
UiLCH bit in the UiC1 register is set to 0 (no reverse).
2. When not transferring, the CLKi pin outputs a high signal.
Figure 14.11 Polarity of transfer clock
14.1.1.3 LSB First/MSB First Select Function
Use the UFORM bit in the UiC0 register (i=0 to 2) to select the transfer format. Figure 14.12 shows
the transfer format.
(1) When the UFORM bit in the UiC0 register 0 (LSB first)
CLKi
TXDi
D0
D1
D2
D3
D4
D5
D6
D7
RXDi
D0
D1
D2
D3
D4
D5
D6
D7
(2) When the UFORM bit in the UiC0 register is set to 1 (MSB first)
CLKi
TXDi
D7
D6
D5
D4
D3
D2
D1
D0
RXDi
D7
D6
D5
D4
D3
D2
D1
D0
i = 0 to 2
NOTE:
1. This applies to the case where the CKPOL bit in the UiC0 register is set to 0 (transmit data output at
the falling edge and the receive data taken in at the rising edge of the transfer clock) and the
UiLCH bit in the UiC1 register 0 (no reverse).
Figure 14.12 Transfer format
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14.Serial I/O
M16C/29 Group
14.1.1.4 Continuous receive mode
When the UiRRM bit (i=0 to 2) is set to 1 (continuous receive mode), the TI bit in the UiC1 register is
set to 0 (data present in the UiTB register) by reading the UiRB register. In this case, i.e., UiRRM bit is
set to 1, do not write dummy data to the UiTB register in a program. The U0RRM and U1RRM bits are
the bit 2 and bit 3 in the UCON register, respectively, and the U2RRM bit is the bit 5 in the U2C1
register.
14.1.1.5 Serial data logic switch function (UART2)
When the U2LCH bit in the U2C1 register is set to 1 (reverse), the data written to the U2TB register
has its logic reversed before being transmitted. Similarly, the received data has its logic reversed
when read from the U2RB register. Figure 14.13 shows serial data logic.
(1) When the U2LCH bit in the U2C1 register is set to 0 (no reverse)
Transfer clock
TxD2
(no reverse)
“H”
“L”
“H”
“L”
D0
D1
D2
D3
D4
D5
D6
D7
(2) When the U2LCH bit in the U2C1 register is set to 1 (reverse)
Transfer clock
TxD2
(reverse)
“H”
“L”
“H”
“L”
D0
D1
D2
D3
D4
D5
D6
D7
NOTE:
1. This applies to the case where the CKPOL bit in the U2C0 register is set to 0 (transmit data
output at the falling edge and the receive data taken in at the rising edge of the transfer
clock) and the UFORM bit is set to 0 (LSB first).
Figure 14.13 Serial data logic switch timing
14.1.1.6 Transfer clock output from multiple pins function (UART1)
The CLKMD1 to CLKMD0 bits in the UCON register can choose one from two transfer clock output
pins. (See Figure 14.14) This function is valid when the internal clock is selected for UART1.
MCU
TXD1 (P6 7)
CLKS 1 (P6 4)
CLK1 (P6 5)
IN
IN
CLK
CLK
Transfer enabled
when the CLKMD0
bit in the UCON
register is set to 0
Transfer enabled
when the CLKMD0
bit in the UCON
register is set to 1
NOTES:
1. This applies to the case where the CKDIR bit in the U1MRregister is set to 0 (internal clock) and
the CLKMD1 bit in the UCON register is set to 1 (transfer clock output from multiple pins).
2. This applies to the case where U1MAP bit in PACR register is set to 0 (P67 to P64).
Figure 14.14 Transfer Clock Output From Multiple Pins
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14. Serial I/O
M16C/29 Group
_______ _______
14.1.1.7 CTS/RTS separate function (UART0)
_______
_______
_______
_______
This function separates CTS0/RTS0, outputs RTS0 from the P60 pin, and accepts as input the CTS0
from the P64 pin or P70 pin. To use this function, set the register bits as shown below.
_______ _______
• The CRD bit in the U0C0 register is set to 0 (enables UART0 CTS/RTS)
_______
• The CRS bit in the U0C0 register is set to 1 (outputs UART0 RTS)
_______ _______
• The CRD bit in the U1C0 register is set to 0 (enables UART1 CTS/RTS)
_______
• The CRS bit in the U1C0 register is set to 0 (inputs UART1 CTS)
_______
• The RCSP bit in the UCON register is set to 1 (inputs CTS0 from the P64 pin or P70 pin)
• The CLKMD1 bit in the UCON register is set to 0 (CLKS1 not used)
_______ _______
_______ _______
Note that when using the CTS/RTS separate function, UART1 CTS/RTS separate function cannot be
used.
IC
MCU
TXD0 (P6 3)
IN
RXD0 (P6 2)
OUT
CLK0 (P6 1)
CLK
RTS0 (P60)
CTS
CTS0 (P6 4)
RTS
NOTE:
1. This applies to the case where the U1MAP bit in the PACR register is set to 0 (P67 to P64).
Figure 14.15 CTS/RTS separate function usage
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14.Serial I/O
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14.1.2 Clock Asynchronous Serial I/O (UART) Mode
The UART mode allows transmitting and receiving data after setting the desired bit rate and transfer data
format. Table 14.5 lists the specifications of the UART mode.
Table 14.5 UART Mode Specifications
Item
Transfer data format
Transfer clock
Transmission, reception control
Transmission start condition
Reception start condition
Interrupt request
generation timing
Error detection
Select function
Specification
• Character bit (transfer data): Selectable from 7, 8 or 9 bits
• Start bit: 1 bit
• Parity bit: Selectable from odd, even, or none
• Stop bit: Selectable from 1 or 2 bits
• The CKDIR bit in the UiMR(i=0 to 2) register is set to 0 (internal clock) : fj/ (16(n+1))
0016 to FF16
fj = f1SIO, f2SIO, f8SIO, f32SIO. n: Setting value of UiBRG register
• CKDIR bit is set to 1 (external clock ) : fEXT/16(n+1)
fEXT: Input from CLKi pin. n :Setting value of UiBRG register
0016 to FF16
_______
_______
_______ _______
• Selectable from CTS function, RTS function or CTS/RTS function disable
• Before transmission can start, the following requirements must be met
_ The TE bit in the UiC1 register is set to 1 (transmission enabled)
_ The TI bit in the UiC1 register is set to 0 (data present in UiTB register)
_______
_______
_ If CTS function is selected, input on the CTSi pin is set to “L”
• Before reception can start, the following requirements must be met"
_ The RE bit in the UiC1 register is set to 1 (reception enabled)
_ Start bit detection
• For transmission, one of the following conditions can be selected
_ The UiIRS bit (2) is set to 0 (transmit buffer empty): when transferring data from the
UiTB register to the UARTi transmit register (at start of transmission)
_ The UiIRS bit is set to1 (transfer completed): when the serial I/O finished sending
data from the UARTi transmit register
• For reception
When transferring data from the UARTi receive register to the UiRB register (at
completion of reception)
• Overrun error (1)
This error occurs if the serial I/O started receiving the next data before reading the
UiRB register and received the bit one before the last stop bit in the the next data
• Framing error
This error occurs when the number of stop bits set is not detected
• Parity error
This error occurs when if parity is enabled, the number of 1 in parity and
character bits does not match the number of 1 set
• Error sum flag
This flag is set to 1 when any of the overrun, framing, and parity errors is encountered
• LSB first, MSB first selection
Whether to start sending/receiving data beginning with bit 0 or beginning with bit 7
can be selected
• Serial data logic switch (UART2)
This function reverses the logic of the transmit/receive data. The start and stop bits
are not reversed.
• TXD, RXD I/O polarity switch (UART2)
This function reverses the polarities of hte TXD pin output and RXD pin input. The
logic levels
of all I/O data is reversed.
_______ _______
• Separate
CTS/RTS
pins (UART0)
_________
_________
CTS0 and RTS0 are input/output from separate pins
• UART1 pin remapping selection
The UART1 pin can be selected from the P67 to P64 or P73 to P70
NOTES:
1. If an overrun error occurs, bits 8 to 0 in the UiRB register are undefined. The IR bit in the SiRIC register remains unchange.
2. Bits U0IRS and U1IRS respectively are the UCON register bits 0 and 1; the U2IRS bit is the U2C1 register bit 4.
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14. Serial I/O
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Table 14.6 Registers to Be Used and Settings in UART Mode
Register
Bit
Function
UiTB
0 to 8
Set transmission data (1)
UiRB
0 to 8
Reception data can be read (1)
UiBRG
0 to 7
Set bit rate
UiMR
SMD2 to SMD0
Set these bits to 1002 when transfer data is 7 bits long
OER,FER,PER,SUM Error flag
Set these bits to 1012 when transfer data is 8 bits long
Set these bits to 1102 when transfer data is 9 bits long
CKDIR
UiC0
Select the internal clock or external clock
STPS
Select the stop bit
PRY, PRYE
Select whether parity is included and whether odd or even
IOPOL(i=2) (4)
Select the TxD/RxD input/output polarity
CLK0, CLK1
Select the count source for the UiBRG register
CRS
Select CTS or RTS to use
TXEPT
Transmit register empty flag
CRD
Enable or disable the CTS or RTS function
NCH
Select TxDi pin output mode
_______
_______
_______
_______
CKPOL
Set to 0
UFORM
LSB first or MSB first can be selected when transfer data is 8 bits long. Set this
bit to 0 when transfer data is 7 or 9 bits long.
UiC1
TE
Set this bit to 1 to enable transmission
TI
Transmit buffer empty flag
RE
Set this bit to 1 to enable reception
RI
Reception complete flag
U2IRS (2)
Select the source of UART2 transmit interrupt
U2RRM (2)
Set to 0
UiLCH (3)
Set this bit to 1 to use UART2 inverted data logic
UiERE
(3)
Set to 0
UiSMR
0 to 7
Set to 0
UiSMR2
0 to 7
Set to 0
UiSMR3
0 to 7
Set to 0
UiSMR4
0 to 7
Set to 0
UCON
U0IRS, U1IRS
Select the source of UART0/UART1 transmit interrupt
U0RRM, U1RRM
Set to 0
CLKMD0
Invalid because CLKMD1 is set to 0
CLKMD1
Set to 0
RCSP
Set this bit to 1 to accept as input the UART0 CTS0 signal from the P64 pin
7
Set to 0
_________
NOTES:
1. The bits used for transmit/receive data are as follows: Bit 0 to bit 6 when transfer data is 7 bits long;
bits 7 to 0 when transfer data is 8 bits long; bit 0 to bit 8 when transfer data is 9 bits long.
2. Set bits 5 and 4 in registers U0C1 and U1C1 to 0. Bits U0IRS, U1IRS, U0RRM and U1RRM are
included in the UCON register.
3. Set bits 7 and 6 in registers U0C1 and U1C1 to 0.
4. Set the bit 7 in registers U0MR and U1MR to 0.
i=0 to 2
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14.Serial I/O
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Table 14.7 lists the functions of the input/output pins in UART mode. Table 14.8 lists the P64 pin functions during UART mode. Note that for a period from when the UARTi operation mode is selected to when
transfer starts, the TxDi pin outputs an “H”. (If the N-channel open-drain output is selected, this pin is in a
high-impedance state.)
Table 14.7 I/O Pin Functions in UART mode(1)
Method of Selection
Function
Pin Name
TxDi (i = 0 to 2) Serial data output
(P63, P67, P70)
(Outputs "H" when performing reception only)
Serial data input
RxDi
(P62, P66, P71)
PD6_2 bit, PD6_6 bit in the PD6 register and the PD7_1 bit in the PD7 register
(Can be used as an input port when performing transmission only)
Input/output port
CLKi
(P61, P65, P72)
Transfer clock input
Set the CKDIR bit in the UiMR register to 0
Set the CKDIR bit in the UiMR register to 1
Set the PD6_1 bit and PD6_5 bit in the PD6 register to 0, PD7_2 bit in the PD7
register to 0
Set the CRD bit in the UiC0 register to 0
Set the CRS bit in the UiC0 register to 0
Set the PD6_0 bit and PD6_4 bit in the PD6 register to 0, the PD7_3 bit in the
PD7 register 0
Set the CRD bit in the UiC0 register to 0
Set the CRS bit in the UiC0 register to 1
CTS input
CTSi/RTSi
(P60, P64, P73)
RTS output
Input/output port
Set the CRD bit in the UiC0 register 1
NOTE:
1. When the U1MAP bit in PACR register is set to 1 (P73 to P70), UART1 pin is assgined to P73 to P70.
Table 14.8 P64 Pin Functions in UART mode (1)
Bit Set Value
Pin Function
P64
U1C0 register
CRS
CRD
CTS1
RTS1
CTS0 (2)
1
0
0
0
0
1
0
UCON register
CLKMD1
RCSP
0
0
0
1
0
0
0
0
PD6 register
PD6_4
Input: 0, Output: 1
0
0
NOTES:
1. When the U1MAP bit in PACR register is 1 (P73 to P70), this table lists the P70 functions.
2. In addition to this, set the CRD bit in the U0C0 register to 0 (CTS0/RTS0 enabled) and the
CRS bit in the U0C0 register to 1 (RTS0 selected).
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14. Serial I/O
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• Example of transmit timing when transfer data is 8-bit long (parity enabled, one stop bit)
The transfer clock stops momentarily as CTSi is “H” when the stop bit is checked.
The transfer clock starts as the transfer starts immediately CTSi changes to “L”.
Tc
Transfer clock
UiC1 register
TE bit
1
0
UiC1 register
TI bit
Write data to the UiTB register
1
0
CTSi
Transferred from UiTB register to UARTi transmit register
“H”
“L”
Start
bit
TxDi
UiC0 register
TXEPT bit
SiTIC register
IR bit
Stopped pulsing
because the TE bit
= “0”
Parity Stop
bit bit
ST D0 D1 D2 D3 D4 D5 D6 D7
P
SP
ST D0 D1 D2 D3 D4 D5 D6 D7
P
SP
ST D0 D1
1
0
1
0
Cleared to 0 when interrupt request is accepted, or cleared to 0 by program
Tc = 16 (n + 1) / fj or 16 (n + 1) / fEXT
The above timing diagram applies to the case where the register bits
are set as follows:
fj: frequency of UiBRG count source (f1SIO, f2SIO, f8SIO, f32SIO)
• Set the PRYE bit in the UiMR register to 1 (parity enabled)
fEXT: frequency of UiBRG count source (external clock)
• Set the STPS bit in the UiMR register to 0 (1 stop bit)
n: value set to UiBRG
• Set the CRD bit in the UiC0 register to 0 (CTS/RTS enabled),
i = 0 to 2
the CRS bit to 0 (CTS selected).
• Set the UiIRS bit to 1 (an interrupt request occurs when transmit completed):
U0IRS bit is the UCON register bit 0, U1IRS bit is the UCON
register bit 1, and U2IRS bit is the U2C1 register bit 4
• Example of transmit timing when transfer data is 9-bit long (parity disabled, two stop bits)
Tc
Transfer clock
UiC1 register
TE bit
UiC1 register
TI bit
1
Write data to the UiTB register
0
1
0
Start
bit
TxDi
Stop Stop
bit bit
ST D0 D1 D2 D3 D4 D5 D6 D7 D8 SP SP
UiC0 register
TXEPT bit
1
SiTIC register
IR bit
1
Transferred from UiTB register to UARTi
transmit register
ST D0 D1 D2 D3 D4 D5 D6 D7 D8 SPSP
ST D0 D1
0
0
Cleared to 0 when interrupt request is accepted, or cleared to 0 by program
The above timing diagram applies to the case where the register bits are
set as follows:
• Set the PRYE bit in the UiMR register to 0 (parity disabled)
• Set the STPS bit in the UiMR register to 1 (2 stop bits)
• Set the CRD bit in the UiC0 register to 1 (CTS/RTS disabled)
• Set the UiIRS bit to 0 (an interrupt request occurs when transmit buffer
becomes empty):
U0IRS bit is the UCON register bit 0, U1IRS bit is the UCON
register bit 1, and U2IRS bit is the U2C1 register bit 4
Tc = 16 (n + 1) / fj or 16 (n + 1) / fEXT
fj: frequency of UiBRG count source (f1SIO, f2SIO, f8SIO, f32SIO)
fEXT: frequency of UiBRG count source (external clock)
n: value set to UiBRG
i = 0 to 2
Figure 14.16 Typical transmit timing in UART mode (UART0, UART1)
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14.Serial I/O
M16C/29 Group
• Example of receive timing when transfer data is 8 bits long (parity disabled, one stop bit)
UiBRG count
source
UiC1 register
RE bit
1
0
Start
bit
RxDi
D0
Sampled “L”
D1
D7
Stop bit
Receive data taken in
Transfer clock
UiC1 register
RI bit
RTSi
SiRIC register
IR bit
1
Reception triggered when transfer clock
is generated by falling edge of start bit
Transferred from UARTi receive
register to UiRB register
Read out from
UiRB register
0
“H”
“L”
1
0
Cleared to 0 when interrupt request is accepted, or cleared to 0 by program
The above timing diagram applies to the case where the register bits are set as follows:
• Set the PRYE bit in the UiMR register to 0 (parity disabled)
• Set the STPS bit in the UiMR register to 0 (1 stop bit)
• Set the CRD bit in the UiC0 register to 0 (CTSi/RTSi enabled), the CRS bit to 1 (RTSi selected)
i = 0 to 2
Figure 14.17 Receive Operation
14.1.2.1 Bit Rates
In UART mode, the frequency set by the UiBRG register (i=0 to 2) divided by 16 become the bit rates.
Table 14.9 lists example of bit rate and settings.
Table 14.9 Example of Bit Rates and Settings
Bit Rate
(bps)
1200
2400
4800
9600
14400
19200
28800
31250
38400
51200
Count Source
of BRG
f8
f8
f8
f1
f1
f1
f1
f1
f1
f1
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REJ09B0101-0112
Peripheral Function Clock : 16MHz Peripheral Function Clock : 20MHz
Set Value of BRG : n Actual Time (bps) Set Value of BRG : n Actual Time (bps)
103(67h)
1202
129(81h)
1202
51(33h)
2404
64(40h)
2404
25(19h)
4808
32(20h)
4735
103(67h)
9615
129(81h)
9615
68(44h)
14493
86(56h)
14368
51(33h)
19231
64(40h)
19231
34(22h)
28571
42(2Ah)
29070
31(1Fh)
31250
39(27h)
31250
25(19h)
38462
32(20h)
37879
19(13h)
50000
24(18h)
50000
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14. Serial I/O
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14.1.2.2 Counter Measure for Communication Error
If a communication error occurs while transmitting or receiving in UART mode, follow the procedure
below.
• Resetting the UiRB register (i=0 to 2)
(1) Set the RE bit in the UiC1 register to 0 (reception disabled)
(2) Set the RE bit in the UiC1 register to 1 (reception enabled)
• Resetting the UiTB register (i=0 to 2)
(1) Set bits SMD2 to SMD0 in UiMR register 0002 (Serial I/O disabled)
(2) Set bits SMD2 to SMD0 in UiMR register 0012, 1012, 1102
(3) 1 is written to TE bit in the UiC1 register (reception enabled), regardless of the TE bit
14.1.2.3 LSB First/MSB First Select Function
As shown in Figure 14.18, use the UFORM bit in the UiC0 register to select the transfer format. This
function is valid when transfer data is 8 bits long.
(1) When the UFORM bit in the UiC0 register is set to 0 (LSB first)
CLKi
TXDi
ST
D0
D1
D2
D3
D4
D5
D6
D7
P
SP
RXDi
ST
D0
D1
D2
D3
D4
D5
D6
D7
P
SP
(2) When the UFORM bit in the UiC0 register is set to 1 (MSB first)
CLKi
TXDi
ST
D7
D6
D5
D4
D3
D2
D1
D0
P
SP
RXDi
ST
D7
D6
D5
D4
D3
D2
D1
D0
P
SP
ST : Start bit
P : Parity bit
SP : Stop bit
i = 0 to 2
NOTE:
1. This applies to the case where the CKPOL bit in the UiC0 register is set to 0 (transmit data output at the
falling edge and the receive data taken in at the rising edge of the transfer clock), the UiLCH bit in the UiC1
register is set to 0 (no reverse), the STPS bit in the UiMR register is set to 0 (1 stop bit) and the PRYE bit in
the UiMR register is set to 1 (parity enabled).
Figure 14.18 Transfer Format
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14.Serial I/O
M16C/29 Group
14.1.2.4 Serial Data Logic Switching Function (UART2)
The data written to the U2TB register has its logic reversed before being transmitted. Similarly, the
received data has its logic reversed when read from the U2RB register. Figure 14.19 shows serial
data logic.
(1) When the U2LCH bit in the U2C1 register is set to 0 (no reverse)
Transfer clock
“H”
TxD2
“H”
(no reverse)
“L”
ST
“L”
D0
D1
D2
D3
D4
D5
D6
D7
P
SP
D7
P
SP
(2) When the U2LCH bit in the U2C1 register is set 1 (reverse)
Transfer clock
“H”
TxD2
“H”
(reverse)
“L”
ST
“L”
D0
D1
D2
D3
D4
D5
D6
NOTE:
1. This applies to the case where the CKPOL bit in the U2C0 register is set to 0
(transmit data output at the falling edge of the transfer clock), the UFORM bit in
the U2C0 register is set to 0 (LSB first), the STPS bit in the U2MR register is set
to 0 (1 stop bit) and the PRYE bit in the U2MR register is set to 1 (parity
ST: Start bit
P: Parity bit
SP: Stop bit
Figure 14.19 Serial Data Logic Switching
14.1.2.5 TxD and RxD I/O Polarity Inverse Function (UART2)
This function inverses the polarities of the TXD2 pin output and RXD2 pin input. The logic levels of all
input/output data (including the start, stop and parity bits) are inversed. Figure 14.20 shows the TXD
pin output and RXD pin input polarity inverse.
(1) When the IOPOL bit in the U2MR register is set to 0 (no reverse)
Transfer clock
“H”
“L”
TxD2
“H”
RxD2
“H”
(no reverse) “L”
(no reverse) “L”
ST
D0
D1
D2
D3
D4
D5
D6
D7
P
SP
ST
D0
D1
D2
D3
D4
D5
D6
D7
P
SP
(2) When the IOPOL bit in the U2MR register is set to 1 (reverse)
Transfer clock
“H”
“L”
TxD2
“H”
(reverse)
“L”
RxD2
“H”
“L”
(reverse)
ST
D0
D1
D2
D3
D4
D5
D6
D7
P
SP
ST
D0
D1
D2
D3
D4
D5
D6
D7
P
SP
NOTE:
1. This applies to the case where the UFORM bit in the U2C0 register is set
to 0 (LSB first), the STPS bit in the U2MR register is set to 0 (1 stop bit)
and the PRYE bit in the U2MR register is set to 1 (parity enabled).
Figure 14.20 TXD and RXD I/O Polarity Inverse
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ST: Start bit
P: Parity bit
SP: Stop bit
14. Serial I/O
M16C/29 Group
_______ _______
14.1.2.6 CTS/RTS Separate Function (UART0)
_______
_______
_______
_______
This function separates CTS0/RTS0, outputs RTS0 from the P60 pin, and accepts as input the CTS0
from the P64 pin or P70 pin. To use this function, set the register bits as shown below.
_______ _______
• The CRD bit in the U0C0 register is set to 0 (enables UART0 CTS/RTS)
_______
• The CRS bit in the U0C0 register is set to 1 (outputs UART0 RTS)
_______ _______
• The CRD bit in the U1C0 register is set to 0 (enables UART1 CTS/RTS)
_______
• The CRS bit in the U1C0 register is set to 0 (inputs UART1 CTS)
_______
• The RCSP bit in the UCON register is set to 1 (inputs CTS0 from the P64 pin or P70 pin)
• The CLKMD1 bit in the UCON register is set to 0 (CLKS1 not used)
_______ _______
_______ _______
Note that when using the CTS/RTS separate function, UART1 CTS/RTS separate function cannot be
used.
MCU
IC
TXD0 (P6 3)
IN
RXD0 (P6 2)
OUT
RTS0 (P60)
CTS
CTS0 (P6 4)
RTS
NOTE:
1. This applies to the case where the U1MAP bit in the PACR register is set to 0 (P67 to P64).
_______ _______
Figure 14.21 CTS/RTS Separate Function
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14. Serial I/O
M16C/29 Group
14.1.3 Special Mode 1 (I2C bus mode)(UART2)
I2C bus mode is provided for use as a simplifed I2C bus interface compatible mode. Table 14.10 lists the
specifications of the I2C bus mode. Tables 14.11 and 14.12 list the registers used in the I2C bus mode
and the register values set. Table 14.13 lists the I2C bus mode fuctions. Figure 14.22 shows the block
diagram for I2C bus mode. Figure 14.23 shows SCL2 timing.
As shown in Table 14.13, the MCU is placed in I2C bus mode by setting bits SMD2 to SMD0 to 0102 and
the IICM bit to 1. Because SDA2 transmit output has a delay circuit attached, SDA output does not
change state until SCL2 goes low and remains stably low.
Table 14.10 I2C bus mode Specifications
Item
Specification
Transfer data format
• Transfer data length: 8 bits
Transfer clock
• During master
the CKDIR bit in the U2MR register is set to 0 (internal clock) : fj/ (2(n+1))
fj = f1SIO, f2SIO, f8SIO, f32SIO. n: Setting value in the U2BRG register 0016 to FF16
• During slave
Transmission start condition
CKDIR bit is set to 1 (external clock ) : Input from SCL2 pin
• Before transmission can start, the following requirements must be met (1)
_
_
Reception start condition
The TE bit in the U2C1 register is set to 1 (transmission enabled)
The TI bit in the U2C1 register is set to 0 (data present in U2TB register)
• Before reception can start, the following requirements must be met (1)
The RE bit in the U2C1 register is set to 1 (reception enabled)
_
_
_
The TE bit in the U2C1 register is set to 1 (transmission enabled)
The TI bit in the U2C1 register is set to 0 (data present in the UiTB register)
Interrupt request
generation timing
When start or stop condition is detected, acknowledge undetected, and acknowledge
detected
Error detection
• Overrun error (2)
This error occurs if the serial I/O started receiving the next data before reading the
Select function
U2RB register and received the 8th bit in the the next data
• Arbitration lost
Timing at which the ABT bit in the U2RB register is updated can be selected
• SDA digital delay
No digital delay or a delay of 2 to 8 U2BRG count source clock cycles selectable
• Clock phase setting
With or without clock delay selectable
NOTES:
1. When an external clock is selected, the conditions must be met while the external clock is in the high
state.
2. If an overrun error occurs, bits 8 to 0 in the U2RB register are undefined. The IR bit in the S2RIC
register remains unchange.
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14. Serial I/O
M16C/29 Group
Start and stop condition generation block
SDA2
Delay
circuit
ACKC=1
STSPSEL=1
SDASTSP
SCLSTSP
STSPSEL=0
ACKC=0
UART2
SDHI
ACKD bit
IICM=1 and
IICM2=0
DMA0
IICM2=1
Reception register
UART2
Start condition
detection
S
R
Q
IICM=1 and
IICM2=0
NACK
D Q
T
Falling edge
detection
IICM=0
R
I/O port
STSPSEL=0
Noise
Filter
UART2 receive,
ACK interrupt request,
DMA1 request
Bus
busy
Stop condition
detection
SCL2
UART2 transmit,
NACK interrupt
request
ALS
Arbitration
D Q
T
Noise
Filter
IICM2=1
Transmission
register
DMA0, DMA1 request
Q
D Q
T
Port register
(1)
Internal clock
SWC2
IICM=1UART2 STSPSEL=1
External
clock
R
S
ACK
9th bit
CLK
control
UART2
Start/stop condition
detection interrupt
request
9th bit falling edge
SWC
This diagram applies to the case where bits SMD2 to SMD0 in the U2MR register is set to 0102 and the IICM bit in the U2SMR register
is set to 1.
IICM: Bit in the U2SMR register
IICM2, SWC, ALS, SWC2, SDHI: Bits in the U2SMR2 register
STSPSEL, ACKD, ACKC: Bits in the U2SMR4 register
NOTE:
1. If the IICM bit is set to 1, the pin can be read even when the PD7_1 bit is set to 1 (output mode).
Figure 14.22 I2C bus mode Block Diagram
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14. Serial I/O
M16C/29 Group
Table 14.11 Registers to Be Used and Settings in I2C bus mode (1) (Continued)
Register
U2TB
Bit
Function
0 to 7
U2RB(1) 0 to 7
8
ABT
OER
U2BRG 0 to 7
U2MR(1) SMD2 to SMD0
CKDIR
IOPOL
U2C0
CLK1, CLK0
CRS
TXEPT
CRD
NCH
CKPOL
UFORM
U2C1
TE
TI
RE
RI
U2IRS
U2RRM,
U2LCH, U2ERE
U2SMR IICM
ABC
BBS
3 to 7
U2SMR2 IICM2
CSC
SWC
ALS
STAC
Master
Set transmission data
Slave
Set transmission data
Reception data can be read
ACK or NACK is set in this bit
Arbitration lost detection flag
Overrun error flag
Set bit rate
Set to 0102
Set to 0
Set to 0
Select the count source for the U2BRG
register
Invalid because CRD = 1
Transmit buffer empty flag
Set to 1
Set to 1
Set to 0
Set to 1
Set this bit to 1 to enable transmission
Transmit buffer empty flag
Set this bit to 1 to enable reception
Reception complete flag
Invalid
Set to 0
Reception data can be read
ACK or NACK is set in this bit
Invalid
Overrun error flag
Invalid
Set to 0102
Set to 1
Set to 0
Invalid
Set to 1
Select the timing at which arbitration-lost
is detected
Bus busy flag
Set to 0
Refer to Table 14.13
Set this bit to 1 to enable clock
synchronization
Set this bit to 1 to have SCL2 output
fixed to L at the falling edge of the 9th
bit of clock
Set this bit to 1 to have SDA2 output
stopped when arbitration-lost is detected
Set to 0
SWC2
Set this bit to 1 to have SCL2 output
forcibly pulled low
SDHI
Set this bit to 1 to disable SDA2 output
7
Set to 0
U2SMR3 0, 2, 4 and NODC Set to 0
CKPH
Refer to Table 14.13
DL2 to DL0
Set the amount of SDA2 digital delay
Invalid because CRD = 1
Transmit buffer empty flag
Set to 1
Set to 1
Set to 0
Set to 1
Set this bit to 1 to enable transmission
Transmit buffer empty flag
Set this bit to 1 to enable reception
Reception complete flag
Invalid
Set to 0
Set to 1
Invalid
Bus busy flag
Set to 0
Refer to Table 14.13
Set to 0
Set this bit to 1 to have SCL2 output
fixed to “L” at the falling edge of the 9th
bit of clock
Set to 0
Set this bit to 1 to initialize UART2 at
start condition detection
Set this bit to 1 to have SCL2 output
forcibly pulled low
Set this bit to 1 to disable SDA2 output
Set to 0
Set to 0
Refer to Table 14.13
Set the amount of SDA2 digital delay
NOTE:
1. Not all bits in the register are described above. Set those bits to 0 when writing to the registers in I2C bus mode.
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14. Serial I/O
M16C/29 Group
Table 14.12 Registers to Be Used and Settings in I2C bus Mode (2) (Continued)
Register
Bit
U2SMR4 STAREQ
RSTAREQ
STPREQ
STSPSEL
ACKD
ACKC
SCLHI
SWC9
Function
Master
Set this bit to 1 to generate start
condition
Set this bit to 1 to generate restart
condition
Set this bit to 1 to generate stop
condition
Set this bit to 1 to output each condition
Select ACK or NACK
Set this bit to 1 to output ACK data
Set this bit to 1 to have SCL2 output
stopped when stop condition is detected
Set to 0
Slave
Set to 0
Set to 0
Set to 0
Set to 0
Select ACK or NACK
Set this bit to 1 to output ACK data
Set to 0
Set this bit to 1 to set the SCL2 to “L”
hold at the falling edge of the 9th bit of
clock
NOTE:
1: Not all bits in the register are described above. Set those bits to 0 when writing to the registers in I2C bus mode.
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14. Serial I/O
M16C/29 Group
Table 14.13 I2C bus mode Functions
Function
Clock synchronous serial I/O
I2C bus mode (SMD2 to SMD0 = 0102, IICM = 1)
mode (SMD2 to SMD0 = 0012, IICM2 = 0
IICM2 = 1
IICM = 0)
(NACK/ACK interrupt)
(UART transmit/ receive interrupt)
CKPH = 1
CKPH = 1
CKPH = 0
CKPH = 0
(Clock delay)
(No clock delay) (Clock delay) (No clock delay)
Factor of interrupt number
10 (1) (Refer to Fig.14.23)
Start condition detection or stop condition detection
(Refer to Table 14.14)
Factor of interrupt number UART2 transmission
15 (1) (Refer to Fig.14.23) Transmission started or
completed (selected by U2IRS)
Factor of interrupt number UART2 reception
16 (1) (Refer to Fig.14.23) When 8th bit received
CKPOL = 0 (rising edge)
CKPOL = 1 (falling edge)
Timing for transferring data CKPOL = 0 (rising edge)
from the UART reception CKPOL = 1 (falling edge)
shift register to the U2RB
register
UART2 transmission
Not delayed
output delay
No acknowledgment
detection (NACK)
Rising edge of SCL2 9th bit
Acknowledgment detection
(ACK)
Rising edge of SCL2 9th bit
Rising edge of SCL2 9th bit
UART2 transmission UART2 transmission
Rising edge of
Falling edge of SCL2
SCL2 9th bit
next to the 9th bit
UART2 transmission
Falling edge of SCL2 9th bit
Falling edge of
SCL2 9th bit
Falling and rising
edges of SCL2 9th
bit
Delayed
Functions of P70 pin
TxD2 output
SDA2 input/output
Functions of P71 pin
RxD2 input
SCL2 input/output
Functions of P72 pin
CLK2 input or output selected
Noise filter width
15ns
Read RxD2 and SCL2 pin
levels
Always possible no matter how the corresponding port direction bit is set
Possible when the
corresponding port direction bit
=0
CKPOL = 0 (H)
The value set in the port register before setting I2C bus mode (2)
CKPOL = 1 (L)
Initial value of TxD2 and
SDA2 outputs
(Cannot be used in I2C bus mode)
200ns
Initial and end values of
SCL2
H
DMA1 factor (Refer to Fig. UART2 reception
14.23)
Store received data
1st to 8th bits are stored in
bits bit 7 to 0 in the U2RB
register
Acknowledgment detection
(ACK)
1st to 8th bits are stored in
bits bit 7 to 0 in the U2RB
register
L
H
L
UART2 reception
Falling edge of SCL2 9th bit
1st to 7th bits are stored into the bit 6 to
bit 0 in the U2RB register, with 8th bit
stored in the bit 8 in the U2RB register
1st to 8th bits are
stored in U2RB
register bit 7 to bit 0
(3)
Read received data
U2RB register status is read
directly as is
Read U2RB register
Bit 6 to bit 0 as bit 7
to bit 1, and bit 8 as
bit 0 (4)
NOTES:
1. If the source or cause of any interrupt is changed, the IR bit in the interrupt control register for the changed interrupt
may inadvertently be set to 1 (interrupt requested). (Refer to “Notes on interrupts” in Precautions.)
. change. Therefore,
If one of the bits shown below is changed, the interrupt source, the interrupt timing, etc.
.
always be sure to clear the IR bit to 0 (interrupt not requested) after changing
those bits
Bits SMD2 to the SMD0 in the U2MR register, the IICM bit in the U2SMR register,
the IICM2 bit in the U2SMR2 register, the CKPH bit in the U2SMR3 register
2. Set the initial value of SDA2 output while bits SMD2 to SMD0 in the U2MR register is set to 0002 (serial I/O
disabled).
3. Second data transfer to U2RB register (Rising edge of SCL2 9th bit)
4. First data transfer to U2RB register (Falling edge of SCL2 9th bit)
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14. Serial I/O
M16C/29 Group
(1) When the IICM2 bit is set to 0 (ACK or NACK interrupt) and the CKPH bit is set to 0 (No clock delay)
1st
bit
2nd
bit
3rd
bit
4th
bit
5th
bit
6th
bit
7th
bit
8th
bit
9th
bit
SCL2
SDA2
D7
D6
D5
D4
D3
D2
D1
D8 (ACK or NACK)
D0
ACK interrupt (DMA
request) or NACK interrupt
b15
Data is transferred to the U2RB register
b9
b8
b7
b0
D8 D7 D6 D5 D4 D3 D 2 D1 D0
•••
Contents of the U2RB register
(2) When the IICM2 bit is set to 0 and the CKPH bit is set to 1 (clock delay)
1st
bit
2nd
bit
3rd
bit
4th
bit
5th
bit
6th
bit
7th
bit
8th
bit
9th
bit
SCL2
SDA2
D7
D6
D5
D4
D3
D2
D1
D0
D8 (ACK or NACK)
ACK interrupt (DMA
request) or NACK interrupt
b15
Data is transferred to the U2RB register
•••
b9
b8
b7
b0
D8 D 7 D6 D5 D4 D3 D2 D1 D0
Contents of the U2RB register
(3) When the IICM2 bit is set to 1 (UART transmit or receive interrupt) and the CKPH bit is set to 0
1st
bit
2nd
bit
3rd
bit
4th
bit
5th
bit
6th
bit
7th
bit
8th
bit
9th
bit
SCL2
SDA2
D7
D6
D5
D4
D3
D2
D1
D8 (ACK or NACK)
D0
Receive interrupt
(DMA request)
Transmit interrupt
Data is transferred to the U2RB register
b15
b9
b8
b7
D0
•••
b0
D7 D6 D 5 D4 D3 D2 D1
Contents in the U2RB register
(4) When the IICM2 bit is set to 1 and the CKPH bit is set to 1
1st
bit
2nd
bit
3rd
bit
4th
bit
5th
bit
6th
bit
7th
bit
8th
bit
9th
bit
SCL2
SDA2
D7
D6
D5
D4
D3
D2
D1
D0
D8 (ACK or NACK)
Receive interrupt
(DMA request)
Data is transferred to the U2RB register
b15
b9
•••
b8
D0
b7
b0
D7 D6 D5 D 4 D3 D2 D1
Transmit interrupt
Data is transferred to the U2RB register
b15
b9
•••
Contents in the U2RB register
The above timing applies to the following setting :
• The CKDIR bit in the U2MR register is set to 1 (slave)
Figure 14.23 Transfer to U2RB Register and Interrupt Timing
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b8
b7
b0
D8 D7 D6 D5 D4 D 3 D2 D 1 D0
Contents in the U2RB register
14. Serial I/O
M16C/29 Group
14.1.3.1 Detection of Start and Stop Condition
Whether a start or a stop condition has been detected is determined.
A start condition-detected interrupt request is generated when the SDA2 pin changes state from high
to low while the SCL2 pin is in the high state. A stop condition-detected interrupt request is generated
when the SDA2 pin changes state from low to high while the SCL2 pin is in the high state.
Because the start and stop condition-detected interrupts share the interrupt control register and vector, check the BBS bit in the U2SMR register to determine which interrupt source is requesting the
interrupt.
3 to 6 cycles < setup time (1)
3 to 6 cycles < hold time (1)
Setup time
Hold time
SCL2
SDA2
(Start condition)
SDA2
(Stop condition)
NOTE:
1. When the PCLK1 bit in the PCLKR register is set to 1, the cycles indicates the f1SIO's
generation frequency cycles; when PCLK1 bit is set to 0, the cycles indicated the
f2SIO's generation frequency cycles.
Figure 14.24 Detection of Start and Stop Condition
14.1.3.2 Output of Start and Stop Condition
A start condition is generated by setting the STAREQ bit in the U2SMR4 register to 1 (start).
A restart condition is generated by setting the RSTAREQ bit in the U2SMR4 register to 1 (start).
A stop condition is generated by setting the STPREQ bit in the U2SMR4 register to 1 (start).
The output procedure is described below.
(1) Set the STAREQ bit, RSTAREQ bit or STPREQ bit to 1 (start).
(2) Set the STSPSEL bit in the U2SMR4 register to 1 (output).
Make sure that no interrupts or DMA transfers will occur between (1) and (2).
The function of the STSPSEL bit is shown in Table 14.14 and Figure 14.25.
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14. Serial I/O
M16C/29 Group
Table 14.14 STSPSEL Bit Functions
Function
Output of SCL2 and SDA2 pins
Start/stop condition interrupt
request generation timing
STSPSEL = 0
Output transfer clock and data/
Program with a port determines
how the start condition or stop
condition is output
Start/stop condition are detected
STSPSEL = 1
The STAREQ, RSTAREQ and
STPREQ bit determine how the
start condition or stop condition is
output
Start/stop condition generation
are completed
(1) In slave mode,
CKDIR is set to 1 (external clock)
STPSEL bit
0
1st
2nd
3rd 4th
5th
6th 7th
8th
9th bit
SCL2
SDA2
Start condition detection
interrupt
Stop condition detection
interrupt
(2) In master mode,
CKDIR is set to 0 (internal clock), CKPH is set to 1(clock delayed)
STPSEL bit
Set to 0 by
program
Set to 1 by
program
1st
SCL2
2nd
Set to 1 by
program
3rd 4th
5th
6th
7th
8th
Set to 0 by
program
9th bit
SDA2
Set STAREQ
to 1 (start)
Start condition detection
interrupt
Set STPREQ
to 1 (start)
Stop condition detection
interrupt
Figure 14.25 STSPSEL Bit Functions
14.1.3.3 Arbitration
Unmatching of the transmit data and SDA2 pin input data is checked synchronously with the rising
edge of SCL2. Use the ABC bit in the U2SMR register to select the timing at which the ABT bit in the
U2RB register is updated. If the ABC bit is set to 0 (updated bitwise), the ABT bit is set to 1 at the same
time unmatching is detected during check, and is cleared to 0 when not detected. In cases when the
ABC bit is set to 1, if unmatching is detected even once during check, the ABT bit is set to 1
(unmatching detected) at the falling edge of the clock pulse of 9th bit. If the ABT bit needs to be
updated bytewise, clear the ABT bit to 0 (undetected) after detecting acknowledge in the first byte,
before transferring the next byte.
Setting the ALS bit in the U2SMR2 register to 1 (SDA2 output stop enabled) causes arbitration-lost to
occur, in which case the SDA2 pin is placed in the high-impedance state at the same time the ABT bit
is set to 1 (unmatching detected).
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14. Serial I/O
M16C/29 Group
14.1.3.4 Transfer Clock
Data is transmitted/received using a transfer clock like the one shown in Figure 14.25.
The CSC bit in the U2SMR2 register is used to synchronize the internally generated clock (internal
SCL2) and an external clock supplied to the SCL2 pin. In cases when the CSC bit is set to 1 (clock
synchronization enabled), if a falling edge on the SCL2 pin is detected while the internal SCL2 is high,
the internal SCL2 goes low, at which time the U2BRG register value is reloaded with and starts counting in the low-level interval. If the internal SCL2 changes state from low to high while the SCL2 pin is
low, counting stops, and when the SCL2 pin goes high, counting restarts.
In this way, the UART2 transfer clock is comprised of the logical product of the internal SCL2 and SCL2
pin signal. The transfer clock works from a half period before the falling edge of the internal SCL2 1st
bit to the rising edge of the 9th bit. To use this function, select an internal clock for the transfer clock.
The SWC bit in the U2SMR2 register allows to select whether the SCL2 pin should be fixed to or freed
from low-level output at the falling edge of the 9th clock pulse.
If the SCLHI bit in the U2SMR4 register is set to 1 (enabled), SCL2 output is turned off (placed in the
high-impedance state) when a stop condition is detected.
Setting the SWC2 bit in the U2SMR2 register is set to 1 (0 output) makes it possible to forcibly output
a low-level signal from the SCL2 pin even while sending or receiving data. Clearing the SWC2 bit to 0
(transfer clock) allows the transfer clock to be output from or supplied to the SCL2 pin, instead of
outputting a low-level signal.
If the SWC9 bit in the U2SMR4 register is set to 1 (SCL2 hold low enabled) when the CKPH bit in the
U2SMR3 register is set to 1, the SCL2 pin is fixed to low-level output at the falling edge of the clock
pulse next to the ninth. Setting the SWC9 bit to 0 (SCL2 hold low disabled) frees the SCL2 pin from
low-level output.
14.1.3.5 SDA Output
The data written to the bit 7 to bit 0 (D7 to D0) in the U2TB register is sequentially output beginning
with D7. The ninth bit (D8) is ACK or NACK.
The initial value of SDA2 transmit output can only be set when IICM is set to 1 (I2C bus mode) and bits
SMD2 to SMD0 in the U2MR register is set to 0002 (serial I/O disabled).
Bits DL2 to DL0 in the U2SMR3 register allow to add no delays or a delay of 2 to 8 U2BRG count
source clock cycles to SDA2 output.
Setting the SDHI bit in the U2SMR2 register to 1 (SDA2 output disabled) forcibly places the SDA2 pin
in the high-impedance state. Do not write to the SDHI bit synchronously with the rising edge of the
UART2 transfer clock. This is because the ABT bit may inadvertently be set to 1 (detected).
14.1.3.6 SDA Input
When the IICM2 bit is set to 0, the 1st to 8th bits (D7 to D0) in the received data are stored in bits 7 to
0 in the U2RB register. The 9th bit (D8) is ACK or NACK.
When the IICM2 bit is set to 1, the 1st to 7th bits (D7 to D1) in the received data are stored in the bit 6
to bit 0 in the U2RB register and the 8th bit (D0) is stored in the bit 8 in the U2RB register. Even when
the IICM2 bit is set to 1, providing the CKPH bit is set to 1, the same data as when the IICM2 bit is set
to 0 can be read out by reading the U2RB register after the rising edge of the corresponding clock
pulse of 9th bit.
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14. Serial I/O
M16C/29 Group
14.1.3.7 ACK and NACK
If the STSPSEL bit in the U2SMR4 register is set to 0 (start and stop conditions not generated) and the
ACKC bit in the U2SMR4 register is set to 1 (ACK data output), the value of the ACKD bit in the
U2SMR4 register is output from the SDA2 pin.
If the IICM2 bit is set to 0, a NACK interrupt request is generated if the SDA2 pin remains high at the
rising edge of the 9th bit of transmit clock pulse. An ACK interrupt request is generated if the SDA2 pin
is low at the rising edge of the 9th bit of transmit clock pulse.
If ACK2 is selected for the cause of DMA1 request, a DMA transfer can be activated by detection of an
acknowledge.
14.1.3.8 Initialization of Transmission/Reception
If a start condition is detected while the STAC bit is set to 1 (UART2 initialization enabled), the serial I/
O operates as described below.
- The transmit shift register is initialized, and the content of the U2TB register is transferred to the
transmit shift register. In this way, the serial I/O starts sending data synchronously with the next clock
pulse applied. However, the UART2 output value does not change state and remains the same as
when a start condition was detected until the first bit in the data is output synchronously with the input
clock.
- The receive shift register is initialized, and the serial I/O starts receiving data synchronously with the
next clock pulse applied.
- The SWC bit is set to 1 (SCL2 wait output enabled). Consequently, the SCL2 pin is pulled low at the
falling edge of the ninth clock pulse.
Note that when UART2 transmission/reception is started using this function, the TI does not change
state. Note also that when using this function, the selected transfer clock should be an external clock.
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14. Serial I/O
M16C/29 Group
14.1.4 Special Mode 2 (UART2)
Multiple slaves can be serially communicated from one master. Transfer clock polarity and phase are
selectable. Table 14.15 lists the specifications of Special Mode 2. Table 14.16 lists the registers used in
Special Mode 2 and the register values set. Figure 14.26 shows communication control example for
Special Mode 2.
Table 14.15 Special Mode 2 Specifications
Item
Specification
Transfer data format
• Transfer data length: 8 bits
Transfer clock
• Master mode
the CKDIR bit in the U2MR register is set to 0 (internal clock) : fj/ (2(n+1))
fj = f1SIO, f2SIO, f8SIO, f32SIO. n: Setting value in the U2BRG register
• Slave mode
Transmit/receive control
Transmission start condition
0016 to FF16
CKDIR bit is set to 1 (external clock selected) : Input from CLK2 pin
Controlled by input/output ports
• Before transmission can start, the following requirements must be met (1)
_ The TE bit in the U2C1 register is set to 1 (transmission enabled)
_
Reception start condition
The TI bit in the U2C1 register is set to 0 (data present in U2TB register)
• Before reception can start, the following requirements must be met (1)
_
_
The RE bit in the U2C1 register is set to 1 (reception enabled)
The TE bit in the U2C1 register is set to 1 (transmission enabled)
_
Interrupt request
generation timing
Error detection
The TI bit in the U2C1 register is set to 0 (data present in the U2TB register)
• For transmission, one of the following conditions can be selected
_ The U2IRS bit in the U2C1 register is set to 0 (transmit buffer empty): when trans
ferring data from the U2TB register to the UART2 transmit register (at start of transmission)
_ The U2IRS bit is set to 1 (transfer completed): when the serial I/O finished sending
data from the UART2 transmit register
• For reception
When transferring data from the UART2 receive register to the U2RB register (at
completion of reception)
• Overrun error (2)
This error occurs if the serial I/O started receiving the next data before reading the
U2RB register and received the 7th bit in the the next data
Select function
• Clock phase setting
Selectable from four combinations of transfer clock polarities and phases
NOTES:
1. When an external clock is selected, the conditions must be met while if the CKPOL bit in the U2C0 register is set to
0 (transmit data output at the falling edge and the receive data taken in at the rising edge of the transfer clock), the
external clock is in the high state; if the CKPOL bit in the U2C0 register is set to 1 (transmit data output at the rising
edge and the receive data taken in at the falling edge of the transfer clock), the external clock is in the low state.
2. If an overrun error occurs, bits 8 to 0 in the U2RB register are undefined. The IR bit in the S2RIC register remains
unchanged.
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14. Serial I/O
M16C/29 Group
P13
P12
P93
P72(CLK2)
P72(CLK2)
P71(RxD2)
P71(RxD2)
P70(TxD2)
P70(TxD2)
MCU
(Master)
MCU
(Slave)
P93
P72(CLK2)
P71(RxD2)
P70(TxD2)
MCU
(Slave)
Figure 14.26 Serial Bus Communication Control Example (UART2)
Table 14.16 Registers to Be Used and Settings in Special Mode 2
Register
U2TB(1)
U2RB(1)
U2BRG
U2MR(1)
U2C0
U2C1
U2SMR
U2SMR2
U2SMR3
U2SMR4
Bit
0 to 7
0 to 7
OER
0 to 7
SMD2 to SMD0
CKDIR
IOPOL
CLK1, CLK0
CRS
TXEPT
CRD
NCH
CKPOL
UFORM
TE
TI
RE
RI
U2IRS
U2RRM,
U2LCH, U2ERE
0 to 7
0 to 7
CKPH
NODC
0, 2, 4 to 7
0 to 7
Function
Set transmission data
Reception data can be read
Overrun error flag
Set bit rate
Set to 0012
Set this bit to 0 for master mode or 1 for slave mode
Set to 0
Select the count source for the U2BRG register
Invalid because CRD is set to 1
Transmit register empty flag
Set to 1
Select TxD2 pin output format
Clock phases can be set in combination with the CKPH bit in the U2SMR3 register
Select the LSB first or MSB first
Set this bit to 1 to enable transmission
Transmit buffer empty flag
Set this bit to 1 to enable reception
Reception complete flag
Select UART2 transmit interrupt cause
Set to 0
Set to 0
Set to 0
Clock phases can be set in combination with the CKPOL bit in the U2C0 register
Set to 0
Set to 0
Set to 0
NOTE:
1.Not all bits in the registers are described above. Set those bits to 0 when writing to the registers in Special Mode 2.
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14. Serial I/O
M16C/29 Group
14.1.4.1 Clock Phase Setting Function
One of four combinations of transfer clock phases and polarities can be selected using the CKPH bit
in the U2SMR3 register and the CKPOL bit in the U2C0 register.
Make sure the transfer clock polarity and phase are the same for the master and slave to communicate.
14.1.4.1.1 Master (Internal Clock)
Figure 14.27 shows the transmission and reception timing in master (internal clock).
14.1.4.1.2 Slave (External Clock)
Figure 14.28 shows the transmission and reception timing (CKPH=0) in slave (external clock) while
Figure 14.29 shows the transmission and reception timing (CKPH=1) in slave (external clock).
"H"
Clock output
(CKPOL=0, CKPH=0) "L"
"H"
Clock output
(CKPOL=1, CKPH=0) "L"
Clock output
"H"
(CKPOL=0, CKPH=1) "L"
"H"
Clock output
(CKPOL=1, CKPH=1) "L"
Data output timing
"H"
"L"
D0
D1
D2
D3
D4
D5
D6
Data input timing
Figure 14.27 Transmission and Reception Timing in Master Mode (Internal Clock)
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14. Serial I/O
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Slave control input
"H"
"L"
"H"
Clock input
(CKPOL=0, CKPH=0) "L"
"H"
Clock input
(CKPOL=1, CKPH=0) "L"
Data output timing
"H"
D0
"L"
Data input timing
D1
D2
D3
D4
D5
D6
D7
Undefined
Figure 14.28 Transmission and Reception Timing (CKPH=0) in Slave Mode (External Clock)
Slave control input
"H"
"L"
Clock input
(CKPOL=0, CKPH=1)
"H"
Clock input
(CKPOL=1, CKPH=1)
"H"
Data output timing
"H"
"L"
"L"
"L"
D0
D1
D2
D3
D4
D5
D6
D7
Data input timing
Figure 14.29 Transmission and Reception Timing (CKPH=1) in Slave Mode (External Clock)
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14. Serial I/O
M16C/29 Group
14.1.5 Special Mode 3 (IEBus mode)(UART2)
In this mode, one bit in the IEBus is approximated with one byte of UART mode waveform.
Table 14.17 lists the registers used in IEBus mode and the register values set. Figure 14.30 shows the
functions of bus collision detect function related bits.
If the TxD2 pin output level and RxD2 pin input level do not match, a UART2 bus collision detect interrupt
request is generated.
Table 14.17 Registers to Be Used and Settings in IEBus Mode
Register
U2TB
U2RB(1)
U2BRG
U2MR
U2C0
U2C1
U2SMR
U2SMR2
U2SMR3
U2SMR4
Bit
0 to 8
0 to 8
OER,FER,PER,SUM
0 to 7
SMD2 to SMD0
CKDIR
STPS
PRY
PRYE
IOPOL
CLK1, CLK0
CRS
TXEPT
CRD
NCH
CKPOL
UFORM
TE
TI
RE
RI
U2IRS
U2RRM,
U2LCH, U2ERE
0 to 3, 7
ABSCS
ACSE
SSS
0 to 7
0 to 7
0 to 7
Function
Set transmission data
Reception data can be read
Error flag
Set bit rate
Set to 1102
Select the internal clock or external clock
Set to 0
Invalid because PRYE is set to 0
Set to 0
Select the TxD/RxD input/output polarity
Select the count source for the U2BRG register
Invalid because CRDis set to 1
Transmit register empty flag
Set to 1
Select TxD2 pin output mode
Set to 0
Set to 0
Set this bit to 1 to enable transmission
Transmit buffer empty flag
Set this bit to 1 to enable reception
Reception complete flag
Select the source of UART2 transmit interrupt
Set to 0
Set to 0
Select the sampling timing at which to detect a bus collision
Set this bit to 1 to use the auto clear function of transmit enable bit
Select the transmit start condition
Set to 0
Set to 0
Set to 0
NOTE:
1. Not all register bits are described above. Set those bits to 0 when writing to the registers in IEBus mode.
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14. Serial I/O
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(1) The ABSCS bit in the U2SMR register (bus collision detect sampling clock select)
If ABSCS=0, bus collision is determined at the rising edge of the transfer clock
Transfer clock
ST
D0
D1
D2
D3
D4
D5
D6
D7
D8
SP
TxD2
RxD2
Input to TA0IN
Timer A0
If ABSCS is set to 1, bus collision is determined when timer
.
A0 (one-shot timer mode) underflows
(2) The ACSE bit in the U2SMR register (auto clear of transmit enable bit)
Transfer clock
ST
D0
D1
D2
D3
D4
D5
D6
D7
D8
SP
TxD2
RxD2
BCNIC register
IR bit (Note)
If ACSE bit is set to 1
automatically clear when bus collision
occurs), the TE bit is cleared to 0
(transmission disabled) when
the IR bit in the BCNIC register is
set to 1 (unmatching detected).
U2C1 register
TE bit
(3) The SSS bit in the U2SMR register (Transmit start condition select)
If SSS bit is set to 0, the serial I/O starts sending data one transfer clock cycle after the transmission enable condition is met.
Transfer clock
ST
D0
D1
D2
D3
D4
D5
D6
D7
D8
SP
D6
D7
D8
SP
TxD2
Transmission enable condition is met
If SSS bit = 1, the serial I/O starts sending data at the rising edge (Note 1) of RxD2
CLK2
ST
TxD2
D0
D1
D2
D3
D4
D5
(Note 2)
RxD2
NOTES:
1: The falling edge of RxD2 when the IOPOL is set to 0; the rising edge of RxD2 when the IOPOL is set to 1.
2: The transmit condition must be met before the falling edge (Note 1) of RxD.
.
This diagram applies to the case where the IOPOL is set to 1 (reversed)
Figure 14.30 Bus Collision Detect Function-Related Bits
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14. Serial I/O
M16C/29 Group
14.1.6 Special Mode 4 (SIM Mode) (UART2)
Based on UART mode, this is an SIM interface compatible mode. Direct and inverse formats can be
implemented, and this mode allows output of a low from the TxD2 pin when a parity error is detected.
Table 14.18 lists the specifications of SIM mode. Table 14.19 lists the registers used in the SIM mode
and the register values set.
Table 14.18 SIM Mode Specifications
Item
Transfer data format
Specification
Transfer clock
Transmission start condition
Reception start condition
Interrupt request
generation timing (2)
Error detection
• Direct format
• Inverse format
• The CKDIR bit in the U2MR register is set to 0 (internal clock) : fi/ (16(n+1))
fi = f1SIO, f2SIO, f8SIO, f32SIO. n: Setting value of U2BRG register
0016 to FF16
• The CKDIR bit is set to 1 (external clock
) : fEXT/16(n+1)
fEXT: Input from CLK2 pin. n: Setting value of U2BRG register
0016 to FF16
• Before transmission can start, the following requirements must be met
_ The TE bit in the U2C1 register is set to 1 (transmission enabled)
_ The TI bit in the U2C1 register is set to 0 (data present in U2TB register)
• Before reception can start, the following requirements must be met
_ The RE bit in the U2C1 register is set to 1 (reception enabled)
_ Start bit detection
• For transmission
When the serial I/O finished sending data from the U2TB transfer register (U2IRS bit =1)
• For reception
When transferring data from the UART2 receive register to the U2RB register (at
completion of reception)
• Overrun error (1)
This error occurs if the serial I/O started receiving the next data before reading the
U2RB register and received the bit one before the last stop bit in the the next data
• Framing error
This error occurs when the number of stop bits set is not detected
• Parity error
During reception, if a parity error is detected, parity error signal is output from the
TxD2 pin.
During transmission, a parity error is detected by the level of input to the RXD2 pin
when a transmission interrupt occurs
• Error sum flag
This flag is set to 1 when any of the overrun, framing, and parity errors is encountered
NOTES:
1. If an overrun error occurs, bits 8 to 0 in the U2RB register are undefined. The IR bit in the S2RIC
register remains unchanged.
2. A transmit interrupt request is generated by setting the U2IRS bit in the U2C1 register to 1 (transmission complete) and U2ERE bit to 1 (error signal output) after reset. Therefore, when using SIM
mode, be sure to clear the IR bit to 0 (no interrupt request) after setting these bits.
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14. Serial I/O
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Table 14.19 Registers to Be Used and Settings in SIM Mode
Register
U2TB(1)
U2RB(1)
U2BRG
U2MR
U2C0
U2C1
Bit
0 to 7
0 to 7
OER,FER,PER,SUM
0 to 7
SMD2 to SMD0
CKDIR
STPS
PRY
PRYE
IOPOL
Function
Set transmission data
Reception data can be read
Error flag
Set bit rate
Set to 1012
Select the internal clock or external clock
Set to 0
Set this bit to 1 for direct format or 0 for inverse format
Set to 1
Set to 0
CLK1, CLK0
Select the count source for the U2BRG register
CRS
Invalid because CRDis set to 1
TXEPT
Transmit register empty flag
CRD
Set to 1
NCH
Set to 0
CKPOL
Set to 0
UFORM
Set this bit to 0 for direct format or 1 for inverse format
TE
Set this bit to 1 to enable transmission
TI
Transmit buffer empty flag
RE
Set this bit to 1 to enable reception
RI
Reception complete flag
U2IRS
Set to 1
U2RRM
Set to 0
U2LCH
Set this bit to 0 for direct format or 1 for inverse format
U2ERE
Set to 1
U2SMR(1)
0 to 3
Set to 0
U2SMR2
0 to 7
Set to 0
U2SMR3
0 to 7
Set to 0
U2SMR4
0 to 7
Set to 0
NOTE:
1. Not all register bits are described above. Set those bits to 0 when writing to the registers in SIM mode.
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14. Serial I/O
M16C/29 Group
(1) Transmit Timing
Tc
Transfer Clock
TE bit in U2C1
register
1
TI bit in U2C1
register
1
Data is written to
the UART2 register
0
0
Parity Stop
bit
bit
Start
bit
TxD2
D2 D3 D4 D5 D6 D7
ST D0 D1
Parity Error Signal
returned from
Receiving End
P
Data is transferred from the U2TB
register to the UART2 transmit
register
ST D0 D1 D2 D3 D4 D5 D6 D7
SP
P
SP
An "L" signal is applied from the SIM
card due to a parity error
RxD2 pin Level (1)
ST D0 D1 D2 D3 D4 D5 D6 D7
TXEPT bit in U2
C0 register
1
IR bit in S2TIC
register
1
P
ST D0
SP
D1 D2 D3 D4 D5 D 6 D 7
An interrupt routine
detects "H" or "L"
SP
P
An interrupt routine detects
"H" or "L"
0
0
Set to 0 by an interrupt request acknowledgement or by program
The above timing diagram applies to the case where data is
transferred in the direct format.
• U2MR register STPS bit = 0 (1 stop bit)
• U2MR register PRY bit = 1 (even)
• U2C0 register UFORM bit = 0 (LSB first)
• U2C1 register U2LCH bit = 0 (no reverse)
• U2C1 register U2IRSCH bit = 1 (transmit is completed)
(2) Receive Timing
Tc = 16 (n + 1) / fi or 16 (n + 1) / f EXT
fi : frequency of U2BRG count source (f 1SIO, f2SIO, f8SIO, f32SIO)
fEXT : frequency of U2BRG count source (external clock)
n : value set to U2BRG
TC
Transfer Clock
RE bit in U2C1
register
1
0
Start
bit
Transmit Waveform
from the
Transmitting End
ST D0 D1 D2 D3 D4 D5 D6 D7
Parity Stop
bit
bit
ST D0 D1 D2 D3 D4 D5 D6 D7
P SP
TxD2
P
SP
TxD2 outputs "L" due
to a parity error
RxD2 pin Level (2)
ST D0 D1 D2 D3 D4 D5 D6 D7
RI bit in U2C1
register
1
IR bit in S2RIC
register
1
ST D0 D1 D2 D3 D4 D5 D6 D7
P SP
P
SP
0
Read the U2RB register
0
The above timing diagram applies to the case where data is
transferred in the direct format.
• U2MR register STPS bit = 0 (1 stop bit)
• U2MR register PRY bit = 1 (even)
• U2C0 register UFORM bit = 0 (LSB first)
• U2C1 register U2LCH bit = 0 (no reverse)
• U2C1 register U2IRSCH bit = 1 (transmit is completed)
Set to 0 by an interrupt request acknowledgement or by program
Tc = 16 (n + 1) / fi or 16 (n + 1) / f EXT
fi : frequency of U2BRG count source (f 1SIO, f2SIO, f8SIO, f32SIO)
fEXT : frequency of U2BRG count source (external clock)
n : value set to U2BRG
NOTES:
1. Because TxD2 and RxD2 are connected, this is composite waveform consisting of the TxD2 output and the parity error
signal sent back from receiver.
2. Because TxD2 and RxD2 are connected, this is composite waveform consisting of the transmitter's transmit waveform
and the parity error signal received.
Figure 14.31 Transmit and Receive Timing in SIM Mode
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14. Serial I/O
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Figure 14.32 shows the example of connecting the SIM interface. Connect TXD2 and RXD2 and apply
pull-up.
MCU
SIM card
TxD2
RxD2
Figure 14.32 SIM Interface Connection
14.1.6.1 Parity Error Signal Output
The parity error signal is enabled by setting the U2ERE bit in theU2C1 register to 1.
• When receiving
The parity error signal is output when a parity error is detected while receiving data. This is achieved
by pulling the TxD2 output low with the timing shown in Figure 14.33. If the R2RB register is read
while outputting a parity error signal, the PER bit is cleared to 0 and at the same time the TxD2 output
is returned high.
• When transmitting
A transmission-finished interrupt request is generated at the falling edge of the transfer clock pulse
that immediately follows the stop bit. Therefore, whether a parity signal has been returned can be
determined by reading the port that shares the RxD2 pin in a transmission-finished interrupt service
routine.
Transfer
clock
“H”
“L”
RxD 2
“H”
TxD2
“H”
U2C1 register
RI bit
“L”
ST
D0
D1
D2
“L”
D3
D4
D5
D6
D7
SP
(1)
1
0
This timing diagram applies to the case where the direct format is implemented.
NOTE:
1. The output of MCU is in the high-impedance state (pulled up externally).
Figure 14.33 Parity Error Signal Output Timing
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ST: Start bit
P: Even Parity
SP: Stop bit
14. Serial I/O
M16C/29 Group
14.1.6.2 Format
• Direct Format
Set the PRY bit in the U2MR register to 1, the UFORM bit in U2C0 register to 0 and the U2LCH bit in
U2C1 register to 0.
• Inverse Format
Set the PRY bit to 0, UFORM bit to 1 and U2LCH bit to 1.
Figure 14.34 shows the SIM interface format.
(1) Direct format
Transfer clcck
“H”
TxD2
“H”
“L”
“L”
D0
D1
D2
D3
D4
D5
D6
D7
P
P : Even parity
(2) Inverse format
Transfer clcck
“H”
“L”
TxD2
“H”
“L”
D7
D6
D5
D4
D3
D2
D1
D0
P
P : Odd parity
Figure 14.34 SIM Interface Format
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14. Serial I/O
M16C/29 Group
14.2 SI/O3 and SI/O4
Note
The SI/O4 interrupt of peripheral function interrupt is not available in the 64-pin package.
SI/O3 and SI/O4 are exclusive clock-synchronous serial I/Os.
Figure 14.35 shows the block diagram of SI/O3 and SI/O4, and Figure 14.36 shows the SI/O3 and SI/O4related registers.
Table 14.20 shows the specifications of SI/O3 and SI/O4.
Main clock,
f1SIO
PLL clock,
or on-chip oscillator
clock
1/2
f2SIO
Clock source select
SMi1 to SMi0
002
PCLK1=0
PCLK1=1
1/8
1/4
f8SIO
012
f32SIO
102
Synchronous
circuit
SMi4
CLKi
CLK
polarity
reversing
circuit
SMi3
SMi6
Data bus
1/(n+1)
1/2
SiBRG register
SMi6
SI/O counter i
SMi2
SMi3
SOUTi
SMi5 LSB
MSB
SiTRR register
SINi
8
Note: i = 3, 4.
n = A value set in the SiBRG register.
Figure 14.35 SI/O3 and SI/O4 Block Diagram
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SI/Oi
interrupt request
14. Serial I/O
M16C/29 Group
SI/Oi Control Register (i = 3, 4) (1)
b7
b6
b5
b4
b3
b2
b1
Symbol
S3C
S4C
b0
Bit
Symbol
SMi0
Address
036216
036616
After Reset
010000002
010000002
Function
Bit Name
Internal synchronous clock
select bit (5)
RW
b1 b0
RW
0 0 : Selecting f1 or f2
0 1 : Selecting f8
1 0 : Selecting f32
1 1 : Do not set
SMi1
RW
SMi2
SOUTi output disable bit (4)
0 : SOUTi output
1 : SOUTi output disable(high impedance)
RW
SMi3
S I/Oi port select bit
0 : Input/output port
1 : SOUTi output, CLKi function
RW
SMi4
CLK polarity selct bit
0 : Transmit data is output at falling edge of
transfer clock and receive data is input at
rising edge
1 : Transmit data is output at rising edge of
transfer clock and receive data is input at
falling edge
RW
SMi5
Transfer direction select bit
0 : LSB first
1 : MSB first
RW
SMi6
Synchronous clock select bit
0 : External clock (2)
1 : Internal clock (3)
RW
SMi7
SOUTi initial value set bit
Effective when the SMi3 is set to 0
0 : “L” output
1 : “H” output
RW
NOTES:
1. Set the S4C register by the next instruction after setting the PRC2 bit in the PRCR register to 1 (write enable).
2. Set the SMi3 bit to 1 and the corresponding port direction bit to 0 (input mode).
3. Set the SMi3 bit to 1 (SOUTi output, CLKi function) .
4. When the SMi2 bit is set to 1, the corresponding pin goes to high-impedance regardless of the function in use.
5. When the SMi1 and SMi0 bit settings are changed, set the SiBRG register .
SI/Oi Bit Rate Generation Register (i = 3, 4) (1, 2, 3)
b7
b0
Symbol
S3BRG
S4BRG
Address
036316
036716
After Reset
Undefined
Undefined
Description
Setting Range
Assuming that set value = n, BRGi divides the count source by
n+1
0016 to FF16
RW
WO
NOTES:
1. Write to this register while serial I/O is neither transmitting or receiving.
2. Use MOV instruction to write to this register.
3. Set the SiBRG register after setting bits SMi1 and SMi0 in the SiC register.
SI/Oi Transmit/Receive Register (i = 3, 4) (1, 2)
b7
b0
Symbol
S3TRR
S4TRR
Address
036016
036416
After Reset
Undefined
Undefined
Description
Transmission/reception starts by writing transmit data to this register. After
transmission/reception completion, reception data can be read by reading this register.
RW
RW
NOTES:
1. Write to this register while serial I/O is neither transmitting or receiving.
2. To receive data, set the corresponding port direction bit for SINi to 0 (input mode).
Figure 14.36 S3C and S4C Registers, S3BRG and S4BRG Registers, and S3TRR and S4TRR Registers
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14. Serial I/O
M16C/29 Group
Table 14.20 SI/O3 and SI/O4 Specifications
Item
Specification
Transfer data format
Transfer clock
• Transfer data length: 8 bits
• The SMi6 bit in the SiC (i=3, 4) register is set to 1 (internal clock) : fj/ (2(n+1))
fj = f1SIO, f2SIO, f8SIO, f32SIO. n=Setting value of SiBRG register
• SMi6 bit is set to 0 (external clock) : Input from CLKi pin (1)
0016 to FF16.
Transmission/reception
start condition
• Before transmission/reception can start, the following requirements must be met
Write transmit data to the SiTRR register (2, 3)
Interrupt request
• When the SMi4 bit in the SiC register is set to 0
The rising edge of the last transfer clock pulse (4)
generation timing
• When SMi4 is set to 1
The falling edge of the last transfer clock pulse (4)
CLKi pin fucntion
I/O port, transfer clock input, transfer clock output
SOUTi pin function
SINi pin function
I/O port, transmit data output, high-impedance
I/O port, receive data input
Select function
• LSB first or MSB first selection
Whether to start sending/receiving data beginning with bit 0 or beginning with bit 7
can be selected
• Function for setting an SOUTi initial value set function
When the SMi6 bit in the SiC register is set to 0 (external clock), the SOUTi pin
output level while not tranmitting can be selected.
• CLK polarity selection
Whether transmit data is output/input timing at the rising edge or falling edge of
transfer clock can be selected.
NOTE:
1. To set the SMi6 bit in the SiC register to 0 (external clock), follow the procedure described below.
• If the SMi4 bit in the SiC register is set to 0, write transmit data to the SiTRR register while input on the CLKi
pin is high. The same applies when rewriting the SMi7 bit in the SiC register.
• If the SMi4 bit is set to 1, write transmit data to the SiTRR register while input on the CLKi pin is low. The same
applies when rewriting the SMi7 bit.
• Because shift operation continues as long as the transfer clock is supplied to the SI/Oi circuit, stop the transfer
clock 2. Unlike UART0 to UART2, SI/Oi (i = 3 to 4) is not separated between the transfer register and buffer.
Therefore, do not write the next transmit data to the SiTRR register during transmission.
3. When the SMi6 bit in the SiC register is set to 1 (internal clock), SOUTi retains the last data for a 1/2 transfer
clock period after completion of transfer and, thereafter, goes to a high-impedance state. However, if transmit
data is written to the SiTRR register during this period, SOUTi immediately goes to a high-impedance state, with
the data hold time thereby reduced.
4. When the SMi6 bit in the SiC register is set to 1 (internal clock), the transfer clock stops in the high state if the
SMi4 bit is set to 0, or stops in the low state if the SMi4 bit is set to 1.
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14. Serial I/O
M16C/29 Group
14.2.1 SI/Oi Operation Timing
Figure 14.37 shows the SI/Oi operation timing
1.5 cycle (max) (3)
SI/Oi internal clock
"H"
"L"
CLKi output
"H"
"L"
Signal written to the
SiTRR register
"H"
"L"
(2)
SOUTi output
"H"
"L"
SINi input
"H"
"L"
SiIC register
IR bit
D0
D1
D2
D3
D4
D5
D6
D7
1
0
i= 3, 4
NOTES:
1. This diagram applies to the case where the SiC register bits are set as follows:
SMi2 = 0 (SOUTi output), SMi3 = 1 (SOUTi output, CLKi function), SMi4 = 0 (transmit data output at the falling edge and receive data input at the
rising edge of the transfer clock), SMi5 = 0 (LSB first) and SMi6 = 1 (internal clock)
2. When the SMi6 bit is set to 0 (internal clock), the SOUTi pin is placed in the high-impedance state after the transfer is completed.
3. If the SMi6 bit is set to 0 (internal clock), the serial I/O starts sending or receiving data a maximum of 1.5 transfer clock cycles after writing to
the SiTRR register.
Figure 14.37 SI/Oi Operation Timing
14.2.2 CLK Polarity Selection
The the SMi4 bit in the SiC register allows selection of the polarity of the transfer clock. Figure 14.38
shows the polarity of the transfer clock.
(1) When the SMi4 bit in the SiC register is set to 0
(2)
CLKi
SINi
D0
D1
D2
D3
D4
D5
D6
D7
SOUTi
D0
D1
D2
D3
D4
D5
D6
D7
(2) When the SMi4 bit in the SiC register is set to 1
(3)
CLKi
SINi
D0
D1
D2
D3
D4
D5
D6
D7
SOUTi
D0
D1
D2
D3
D4
D5
D6
D7
i=3 and 4
NOTES:
1. This diagram applies to the case where the SiC register bits are set as follows:
SMi5 = 0 (LSB first) and SMi6 = 1 (internal clock)
2. When the SMi6 bit is set to 1 (internal clock), a high level is output from the CLKi pin if not transferring data.
3 When the SMi6 bit is set to 1 (internal clock), a low level is output from the CLKi pin if not transferring data.
Figure 14.38 Polarity of Transfer Clock
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14. Serial I/O
M16C/29 Group
14.2.3 Functions for Setting an SOUTi Initial Value
If the SMi6 bit in SiC register is set to 0 (external clock), the SOUTi pin output level can be fixed high or low
when not transferring data. However, when transmitting data consecutively, the last bit (bit 0) value of the
last transmitted data is retained between the sccessive data transmissions. Figure 14.39 shows the
timing chart for setting an SOUTi initial value and how to set it.
(Example) When “H” selected for SOUTi initial value (1)
Setting of the initial value of S OUT i
output and starting of transmission/
reception
Signal written to
SiTRR register
Set the SMi3 bit to 0
(SOUTi pin functions as an I/O port)
SMi7 bit
SMi3 bit
Set the SMi7 bit to 1
(SOUT i initial value = “H”)
D0
SOUTi (internal)
SOUTi pin output
(i = 3, 4)
Port output
D
0
Initial value = “H” (3)
Setting the SOUTi
initial value to “H”
Port selection switching
(I/O port
SOUTi)
Set the SMi3 bit to 1
(SOUTi pin functions as S OUTi output)
“H” level is output
from the S OUT i pin
Write to the SiTRR register
(2)
NOTES:
1. This diagram applies to the case where the bits in the SiC register are set as follows:
SMi2 = 0 (SOUTi output), SMi5 = 0 (LSB first) and SMi6 = 0 (external clock)
2. SOUTi can only be initialized when input on the CLKi pin is in the high state if the SMi4bit in the SiC
register is set to 0 (transmit data output at the falling edge of the transfer clock) or in the low state if
the SMi4 bit is set to 1 (transmit data output at the rising edge of the transfer clock).
3. If the SMi6 bit is set to 1 (internal clock) or if the SMi2 bit is set to 1 (SOUTi output disabled), this
output goes to the high-impedance state.
Figure 14.39 SOUTi Initial Value Setting
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Serial transmit/reception starts
15. A/D Converter
M16C/29 Group
15. A/D Converter
Note
Ports P04 to P07(AN04 to AN07), P10 to P13(AN20 to AN23) and P95 to P97(AN25 to AN27) are not
available in 64-pin package. Do not use port P04 to P07(AN04 to AN07), P10 to P13(AN20 to AN23)
and P95 to P97(AN25 to AN27) as analog input pins in 64-pin package.
The MCU contains one A/D converter circuit based on 10-bit successive approximation method configured
with a capacitive-coupling amplifier. The analog inputs share the pins with P100 to P107 (AN0 to AN7), P00
to P07 (AN00 to AN07), and P10 to P13, P93, P95 to P97 (AN20 to AN27), and P90 to P92 (AN30 to AN32).
____________
Similarly, ADTRG input shares the pin with P15. Therefore, when using these inputs, make sure the corresponding port direction bits are set to 0 (input mode).
When not using the A/D converter, set the VCUT bit to 0 (Vref unconnected), so that no current will flow
from the Vref pin into the resistor ladder, helping to reduce the power consumption of the chip.
The A/D conversion result is stored in the ADi register bits for ANi, AN0i, AN2i (i = 0 to 7), and AN3i pins (i
= 0 to 2). Table 15.1 shows the A/D converter performance. Figure 15.1 shows the A/D converter block
diagram and Figures 15.2 to 15.4 show the A/D converter associated with registers.
Table 15.1 A/D Converter Performance
Item
Performance
A/D Conversion Method
Successive approximation (capacitive coupling amplifier)
Analog Input Voltage (1)
0V to AVCC (VCC)
Operating Clock φAD (2)
fAD/divided-by-2 or fAD/divided-by-3 or fAD/divided-by-4 or fAD/divided-by-6
or fAD/divided-by-12 or fAD
Resolution
8-bit or 10-bit (selectable)
Integral Nonlinearity Error When AVCC = Vref = 5V
• With 8-bit resolution: ±2LSB
• With 10-bit resolution: ±3LSB
When AVCC = Vref = 3.3V
• With 8-bit resolution: ±2LSB
• With 10-bit resolution: ±5LSB
Operating Modes
One-shot mode, repeat mode, single sweep mode, repeat sweep mode 0, repeat
sweep mode 1, simultaneous sample sweep mode and delayed trigger mode 0,1
Analog Input Pins
8 pins (AN0 to AN7) + 8 pins (AN00 to AN07) + 8 pins (AN20 to AN27) + 3 pins (AN30
to AN32) (80-pin package)
8 pins (AN0 to AN7) + 4 pins (AN00 to AN03) + 1 pin (AN24) + 3 pins (AN30 to AN32)
(64-pin package)
• Without sample and hold function
Conversion Speed Per Pin
8-bit resolution: 49 φAD cycles, 10-bit resolution: 59 φAD cycles
• With sample and hold function
8-bit resolution: 28 φAD cycles, 10-bit resolution: 33 φAD cycles
NOTES:
1. Not dependent on use of sample and hold function.
2. Set the φAD frequency to 10 MHz or less.
Without sample-and-hold function, set the φAD frequency to 250kHZ or more.
With the sample and hold function, set the φAD frequency to 1MHZ or more.
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15. A/D Converter
M16C/29 Group
CKS2=0
fAD
1/3
VREF
1/2
CKS1=1
CKS0=1
1/2
CKS0=0
øAD
CKS1=0
CKS2=1
Resistor ladder
VCUT=0
AVSS
A/D conversion rate
selection
VCUT=1
Successive conversion register
ADCON1 register
(address 03D716)
ADCON0 register
(address 03D616)
Addresses
(03C116 to 03C016)
(03C316 to 03C216)
(03C516 to 03C416)
(03C716 to 03C616)
(03C916 to 03C816)
(03CB16 to 03CA16)
(03CD16 to 03CC16)
(03CF16 to 03CE16)
A/D register 0(16)
A/D register 1(16)
A/D register 2(16)
A/D register 3(16)
A/D register 4(16)
A/D register 5(16)
A/D register 6(16)
A/D register 7(16)
Decoder
for A/D register
Data bus high-order
Data bus low-order
Vref
ADCON2 register
(address 03D416)
Decoder
for channel
selection
Port P0 group
AN00
AN01
AN02
AN03
(Note) AN04
AN05
AN06
AN07
Port P1/Port P9
group (Note)
AN20
AN21
AN22
AN23
AN24
AN25
AN26
AN27
Port P9 group
AN30
AN31
AN32
CH2 to CH0
=0002
=0012
=0102
=0112
=1002
=1012
=1102
=1112
Port P10 group
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
CH2 to CH0
=0002
=0012
=0102
=0112
=1002
=1012
=1102
=1112
VIN
ADGSEL1 to ADGSEL0=002
ADGSEL1 to ADGSEL0=102
SSE = 1
CH2 to CH0=0012
ADGSEL1 to ADGSEL0=112
CH2 to CH0
=0002
=0012
=0102
=0112
=1002
=1012
=1102
=1112
CH2 to CH0
=0002
=0012
=0102
ADGSEL1 to ADGSEL0=012
ADGSEL1 to ADGSEL0=002
ADGSEL1 to ADGSEL0=012
Note: AN04 to AN07, AN20 to AN23, and AN25 to AN27, is available for only 80-pin package.
Figure 15.1 A/D Converter Block Diagram
page 223 of 458
VIN1
Comparator 1
ADGSEL1 to ADGSEL0=102
ADGSEL1 to ADGSEL0=112
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REJ09B0101-0112
Comparator 0
15. A/D Converter
M16C/29 Group
A/D Control Register 0 (1)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
ADCON0
Address
03D6 16
Bit Symbol
After Reset
00000XXX 2
Bit Name
Function
CH0
RW
RW
CH1
Analog input pin select bit
Function varies with each operation mode
CH2
RW
RW
b4 b3
MD0
A/D operation mode
select bit 0
MD1
0 0: One-shot mode or Delayed trigger
mode 0,1
0 1: Repeat mode
1 0: Single sweep mode or Simultaneous
sample sweep mode
1 1: Repeat sweep mode 0 or Repeat
sweep mode 1
RW
RW
TRG
Trigger select bit
0: Software trigger
1: Hardware trigger
RW
ADST
A/D conversion start flag
0: A/D conversion disabled
1: A/D conversion started
RW
CKS0
Frequency select bit 0
See Table 15.2
RW
NOTE:
1. If the ADCON0 register is rewritten during A/D conversion, the conversion result will be undefined.
A/D Control Register 1 (1)
b7
b6
b5
b4
b3
b2
b1
Symbol
ADCON1
b0
Address
03D7 16
After Reset
00 16
Bit Name
Bit Symbol
SCAN0
Function
RW
RW
A/D sweep pin select bit
Function varies with each operation mode
MD2
A/D operation mode
select bit 1
0 : Other than repeat sweep mode 1
1 : Repeat sweep mode 1
RW
BITS
8/10-bit mode select bit
0 : 8-bit mode
1 : 10-bit mode
RW
CKS1
Frequency select bit 1
See Table 15.2
RW
VCUT
Vref connect Bit (2)
0 : Vref not connected
1 : Vref connected
RW
(b7-b6)
Nothing is assigned. If necessary, set to 0.
When read, its content is 0
SCAN1
RW
NOTES:
1. If the ADCON1 register is rewritten during A/D conversion, the conversion result will be undefined.
2. If the VCUT bit is reset from 0 (VREF unconnected) to 1 (VREF connected), wait for 1 µs or more before starting A/D
conversion.
A/D Control Register 2(1)
b7
b6
b5
b4
b3
0
b2
b1
b0
Symbol
ADCON2
Address
03D416
Bit Symbol
SMP
After Reset
0016
Bit Name
A/D conversion method
select bit
Function
0: Without sample and hold
1: With sample and hold
RW
RW
b2 b1
ADGSEL0
ADGSEL1
(b3)
0 0: Select port P10 group
A/D input group select bit 0 1: Select port P9 group
1 0: Select port P0 group
1 1: Select port P1/P9 group
RW
Reserved bit
RW
Set to 0
CKS2
Frequency select bit 2
See Table 15.2
RW
TRG1
Trigger select bit
Function varies with each operation mode
RW
(b7-b6)
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
NOTS:
1. If the ADCON2 register is rewritten during A/D conversion, the conversion result will be undefined.
Figure 15.2 ADCON0 to ADCON2 Registers
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RW
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15. A/D Converter
M16C/29 Group
A/D Trigger Control Register
b7
b6
b5
b4
b3
b2
b1
b0
(1, 2)
Symbol
ADTRGCON
Bit Symbol
Address
After Reset
03D216
0016
Bit Name
Function
0 : Other than simultaneous sample sweep
mode or delayed trigger mode 0,1
1 : Simultaneous sample sweep mode or
delayed trigger mode 0,1
A/D Operation Mode
Select Bit 2
DTE
A/D Operation Mode
Select Bit 3
0 : Other than delayed trigger mode 0,1
1 : Delayed trigger mode 0,1
RW
AN0 Trigger Select Bit
Function varies with each operation mode
RW
AN1 Trigger Select Bit
Function varies with each operation mode
RW
HPTRG0
HPTRG1
(b7-b4)
Nothing is assigned. If necessary, set to 0.
When read, its content is 0
NOTES:
1. If the ADTRGCON register is rewritten during A/D conversion, the conversion result will be undefined.
2. Set 00 16 in this register in one-shot mode, repeat mode, single sweep mode, repeat sweep mode 0 and repeat
sweep mode 1.
Figure 15.3 ADTRGCON Register
Table 15.2 A/D Conversion Frequency Select
CKS2
CKS1
CKS0
0
0
0
fAD divided by 4
0
0
1
fAD divided by 2
0
1
0
0
1
1
1
0
0
fAD divided by 12
1
0
1
fAD divided by 6
1
1
0
1
1
1
ØAD
fAD
fAD divided by 3
NOTE:
1. ØAD frequency must be under 10 MHz. Combination of the CKS0 bit in the
ADCON0 register, the CKS1 bit in the ADCON1 register, and the CKS2 bit in the
ADCON2 register selects ØAD.
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REJ09B0101-0112
RW
RW
SSE
page 225 of 458
15. A/D Converter
M16C/29 Group
A/D Conversion Status Register 0 (1)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
ADSTAT0
Bit Symbol
Address
03D316
After reset
0016
Bit Name
Function
ADERR0
AN1 trigger status flag
ADERR1
Conversion termination flag 0: Conversion not terminated
1: Conversion terminated by
Timer B0 underflow
(b2)
0: AN1 trigger did not occur during
AN0 conversion
1: AN1 trigger occured during
AN0 conversion
RW
RW
RW
Nothing is assigned. If necessary, set to 0.
When read, its content is 0
ADTCSF
Delayed trigger sweep
status flag
0: Sweep not in progress
1: Sweep in progress
RO
ADSTT0
AN0 conversion status flag
0: AN0 conversion not in progress
1: AN0 conversion in progress
RO
ADSTT1
AN1 conversion status flag
0: AN1 conversion not in progress
1: AN1 conversion in progress
RO
ADSTRT0
AN0 conversion
completion status flag
0: AN0 conversion not completed
1: AN0 conversion completed
RW
ADSTRT1
AN1 conversion
completion status flag
0: AN1 conversion not completed
1: AN1 conversion completed
RW
NOTE:
1. ADSTAT0 register is valid only when the DTE bit in the ADTRGCON register is set to 1.
A/D Register i (i=0 to 7)
(b15)
b7
(b8)
b0 b7
Symbol
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
Address
03C1 16 to 03C0 16
03C3 16 to 03C2 16
03C5 16 to 03C4 16
03C7 16 to 03C6 16
03C9 16 to 03C8 16
03CB 16 to 03CA 16
03CD 16 to 03CC 16
03CF 16 to 03CE 16
After Reset
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
Undefined
b0
Function
RW
When the BITS bit in the ADCON1 When the BITS bit in the ADCON1
RW
register is 0 (8-bit mode)
register is 1 (10-bit mode)
Eight low-order bits of
A/D conversion result
A/D conversion result
RO
Two high-order bits of
A/D conversion result
When read, its content is
undefined
RO
Nothing is assigned. If necessary, set to 0.
When read, its content is 0
Figure 15.4 ADSTAT0 Register and AD0 to AD7 Registers
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15. A/D Converter
M16C/29 Group
Timer B2 special mode register (1)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
TB2SC
0 0
After Reset
X00000002
Address
039E16
Bit Symbol
Bit Name
Function
PWCON
Timer B2 reload timing
switch bit (2)
0: Timer B2 underflow
1: Timer A output at odd-numbered
IVPCR1
Three-phase output port
SD control bit 1
TB0EN
Timer B0 operation mode
select bit
0: Three-phase output forcible cutoff
by SD pin input (high impedance)
disabled
1: Three-phase output forcible cutoff
by SD pin input (high impedance)
enabled
0: Other than A/D trigger mode
(5)
1: A/D trigger mode
TB1EN
Timer B1 operation mode
select bit
0: Other than A/D trigger mode
(5)
1: A/D trigger mode
TB2SEL
Trigger select bit
(b6-b5)
Reserved bits
(3, 4, 7)
(b7)
(6)
RW
RW
RW
RW
RW
0: TB2 interrupt
RW
1: Underflow of TB2 interrupt
generation frequency setting counter [ICTB2]
Set to 0
RW
Nothing is assigned. If necessary, set to 0.
When read, its content is 0
NOTES:
1. Write to this register after setting the PRC1 bit in the PRCR register to 1 (write enabled).
2. If the INV11 bit is 0 (three-phase mode 0) or the INV06 bit is 1 (triangular wave modulation mode), set this bit to 0 (timer
B2 underflow).
3. When setting the IVPCR1 bit to 1 (three-phase output forcible cutoff by SD pin input enabled), Set the PD85 bit to 0 (= input
mode).
4. Related pins are U(P80), U(P81), V(P72), V(P73), W(P74), W(P75). When a high-level ("H") signal is applied to the SD pin
and set the IVPCR1 bit to 0 after forcible cutoff, pins U, U, V, V, W, and W are exit from the high-impedance state. If a lowlevel (“L”) signal is applied to the SD pin, three-phase motor control timer output will be disabled (INV03=0). At this time,
when the IVPCR1 bit is 0, pins U, U, V, V, W, and W become programmable I/O ports. When the IVPCR1 bit is set to 1,
pins U, U, V, V, W, and W are placed in a high-impedance state regardless of which function of those pins is used.
5. When this bit is used in delayed trigger mode 0, set bits TB0EN and TB1EN to 1 (A/D trigger mode).
6. When setting the TB2SEL bit to 1 (underflow of TB2 interrupt generation frequency setting counter[ICTB2]), set the INV02
bit to 1 (three-phase motor control timer function).
Figure 15.5 TB2SC Register
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15. A/D Converter
M16C/29 Group
15.1 Operating Modes
15.1.1 One-Shot Mode
In one-shot mode, analog voltage applied to a selected pin is once converted to a digital code. Table
15.3 shows the one-shot mode specifications. Figure 15.6 shows the operation example in one-shot
mode. Figure 15.7 shows registers ADCON0 to ADCON2 in one-shot mode.
Table 15.3 One-shot Mode Specifications
Item
Specification
Function
Bits CH2 to CH0 in the ADCON0 register and registers ADGSEL1 and
ADGSEL0 in the ADCON2 register select pins. Analog voltage applied to a
selected pin is once converted to a digital code
A/D Conversion Start
• When the TRG bit in the ADCON0 register is 0 (software trigger)
Condition
Set the ADST bit in the ADCON0 register to 1 (A/D conversion started)
• When the TRG bit in the ADCON0 register is 1 (hardware trigger)
The ADTRG pin input changes state from “H” to “L” after setting the
ADST bit to 1 (A/D conversion started)
A/D Conversion Stop
• A/D conversion completed (If a software trigger is selected, the ADST bit is
Condition
set to 0 (A/D conversion halted)).
• Set the ADST bit to 0
Interrupt Request Generation Timing A/D conversion completed
Analog Input Pin
Select one pin from AN0 to AN7, AN00 to AN07, AN20 to AN27, AN30 to AN32
Readout of A/D Conversion Result Readout one of registers AD0 to AD7 that corresponds to the selected pin
•Example when selecting AN2 to an analog input pin (Ch2 to CH0 = 0102)
A/D conversion started
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
A/D interrupt request generated
Figure 15.6 Operation Example in One-Shot Mode
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A/D pin input voltage
sampling
A/D pin conversion
15. A/D Converter
M16C/29 Group
A/D Control Register 0 (1)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
ADCON0
0 0
Bit Symbol
Address
03D616
After Reset
00000XXX 2
Bit Name
Function
CH0
0 0 0: Select AN 0
0 0 1: Select AN 1
0 1 0: Select AN 2
0 1 1: Select AN 3
1 0 0: Select AN 4
1 0 1: Select AN 5
1 1 0: Select AN 6
1 1 1: Select AN 7
CH1
CH2
MD0
RW
RW
RW
0 0: One-shot mode or delayed trigger mode
0,1
0: Software trigger
1: Hardware trigger (AD TRG trigger)
Trigger select bit
TRG
RW
b4 b3
A/D operation mode
select bit 0 (3)
MD1
RW
b2 b1 b0
Analog input pin
select bit (2, 3)
ADST
A/D conversion start flag
0: A/D conversion disabled
1: A/D conversion started
CKS0
Frequency select bit 0
See Table 15.2
RW
RW
RW
RW
NOTES:
1. If the ADCON0 register is rewritten during A/D conversion, the conversion result will be undefined.
2. AN0 0 to AN0 7, AN20 to AN2 7, and AN3 0 to AN3 2 can be used in the same way as AN 0 to AN 7. Use bits ADGSEL1
and ADGSEL 0 in the ADCON2 register to select the desired pin.
3. After rewriting bits MD1 and MD0, set bits CH2 to CH0 over again using an another instruction.
A/D Control Register 1 (1)
b7
b6
b5
b4
b3
1
b2
b1
b0
Symbol
ADCON1
0
Bit Symbol
Address
03D7 16
After Reset
00 16
Bit Name
A/D Sweep Pin
Select Bit
SCAN0
Function
Invalid in one-shot mode
RW
RW
RW
SCAN1
A/D Operation Mode
Select Bit 1
0 : Any mode other than repeat sweep
mode 1
RW
8/10-Bit Mode Select Bit
0 : 8-bit mode
1 : 10-bit mode
RW
CKS1
Frequency Select Bit 1
Refer to Table 15.2
RW
VCUT
Vref Connect Bit
1 : Vref connected
RW
MD2
BITS
(2)
Nothing is assigned. If necessary, set to 0.
When read, the contents are 0
(b7-b6)
NOTES:
1. If the ADCON1 register is rewritten during A/D conversion, the conversion result will be undefined.
2. If the VCUT bit is reset from 0 (Vref unconnected) to 1 (Vref connected), wait for 1 µs or more before starting
A/D conversion.
A/D Control Register 2 (1)
b7
b6
b5
0
b4
b3
b2
b1
b0
Symbol
0
ADCON2
Bit Symbol
Address
03D4 16
Bit Name
SMP
A/D conversion method
select bit
ADGSEL0
A/D input group select
bit
CKS2
TRG1
(b7-b6)
Function
0: Without sample and hold
1: With sample and hold
b2 b1
RW
Reserved bit
Set to 0
RW
Frequency select bit 2
See Table 15.2
RW
Trigger select bit 1
Set to 0 in one-shot mode
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
NOTE:
1. If the ADCON2 register is rewritten during A/D conversion, the conversion result will be undefined.
Figure 15.7 ADCON0 to ADCON2 Registers in One-Shot Mode
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RW
RW
0 0: Select port P10 group
0 1: Select port P9 group
1 0: Select port P0 group
1 1: Select port P1/P9 group
ADGSEL1
(b3)
After Reset
0016
RW
RW
15. A/D Converter
M16C/29 Group
15.1.2 Repeat mode
In repeat mode, analog voltage applied to a selected pin is repeatedly converted to a digital code. Table
15.4 shows the repeat mode specifications. Figure 15.8 shows the operation example in repeat mode.
Figure 15.9 shows the ADCON0 to ADCON2 registers in repeat mode.
Table 15.4 Repeat Mode Specifications
Item
Specification
Function
Bits CH2 to CH0 in the ADCON0 register and the ADGSEL1 to ADGSEL0 bits
in the ADCON2 register select pins. Analog voltage applied to a selected pin
is repeatedly converted to a digital code
A/D Conversion Start
• When the TRG bit in the ADCON0 register is 0 (software trigger)
Condition
Set the ADST bit in the ADCON0 register to 1 (A/D conversion started)
• When the TRG bit in the ADCON0 register is 1 (hardware trigger)
The ADTRG pin input changes state from “H” to “L” after setting the ADST bit
to 1 (A/D conversion started)
A/D Conversion Stop Condition Set the ADST bit to 0 (A/D conversion halted)
Interrupt Request Generation Timing None generated
Analog Input Pin
Readout of A/D Conversion Result
Select one pin from AN0 to AN7, AN00 to AN07, AN20 to AN27, and AN30 to AN32
Readout one of the AD0 to AD7 registers that corresponds to the selected pin
•Example when selecting AN2 to an analog input pin (Ch2 to CH0 = 0102)
A/D conversion started
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
Figure 15.8 Operation Example in Repeat Mode
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A/D pin input voltage
sampling
A/D pin conversion
15. A/D Converter
M16C/29 Group
A/D Control Register 0 (1)
b7
b6
b5
b4
b3
b2
b1
b0
0 1
Symbol
ADCON0
Address
03D6 16
Bit Symbol
After Reset
00000XXX 2
Bit Name
Function
b2 b1 b0
CH0
CH1
Analog input pin select
bit(2, 3)
CH2
MD0
A/D operation mode
select bit 0 (3)
MD1
0 0 0: Select AN0
0 0 1: Select AN1
0 1 0: Select AN2
0 1 1: Select AN3
1 0 0: Select AN4
1 0 1: Select AN5
1 1 0: Select AN6
1 1 1: Select AN7
b4 b3
0 1: Repeat mode
RW
RW
RW
RW
RW
RW
TRG
Trigger select bit
0: Software trigger
1: Hardware trigger (ADTRG trigger)
ADST
A/D conversion start flag
0: A/D conversion disabled
1: A/D conversion started
RW
CKS0
Frequency select bit 0
See Table 15.2
RW
RW
NOTES:
1. If the ADCON0 register is rewritten during A/D conversion, the conversion result will be undefined.
2. AN00 to AN07, AN20 to AN27, and AN30 to AN32 can be used in the same way as AN0 to AN7. Use bits ADGSEL1
and ADGSEL 0 in the ADCON2 register to select the desired pin.
3. After rewriting bits MD1 and MD0, set bits CH2 to CH0 over again using an another instruction.
A/D Control Register 1 (1)
b7
b6
b5
b4
b3
1
b2
b1
Symbol
ADCON1
b0
0
Address
03D7 16
After Reset
00 16
Bit Name
Bit Symbol
SCAN0
A/D sweep pin select bit
SCAN1
Function
Invalid in repeat mode
RW
RW
RW
A/D operation mode
select bit 1
0: Other than repeat sweep mode 1
RW
BITS
8/10-bit mode select bit
0: 8-bit mode
1: 10-bit mode
RW
CKS1
Frequency select bit 1
See Table 15.2
RW
VCUT
Vref connect bit (2)
1: Vref connected
RW
(b7-b6)
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
MD2
NOTES:
1. If the ADCON1 register is rewritten during A/D conversion, the conversion result will be undefined.
2. If the VCUT bit is reset from 0 (Vref unconnected) to 1 (Vref connected), wait for 1 µs or more before starting A/D
conversion.
A/D Control Register 2(1)
b7
b6
b5
0
b4
b3
0
b2
b1
b0
Symbol
ADCON2
Bit Symbol
SMP
ADGSEL0
Address
03D416
After Reset
0016
Bit Name
A/D conversion method
select bit
Function
0: Without sample and hold
1: With sample and hold
b2 b1
RW
0 0: Select port P10 group
A/D input group select bit 0 1: Select port P9 group
1 0: Select port P0 group
1 1: Select port P1/P9 group
RW
Reserved bit
Set to 0
RW
CKS2
Frequency select bit 2
See Table 15.2
RW
TRG1
Trigger select bit
Set to 0 in one-shot mode
RW
(b7-b6)
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
ADGSEL1
(b3)
NOTE:
1. If the ADCON2 register is rewritten during A/D conversion, the conversion result will be undefined.
Figure 15.9 ADCON0 to ADCON2 Registers in Repeat Mode
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15. A/D Converter
M16C/29 Group
15.1.3 Single Sweep Mode
In single sweep mode, analog voltages applied to the selected pins are converted one-by-one to a digital
code. Table 15.5 shows the single sweep mode specifications. Figure 15.10 shows the operation
example in single sweep mode. Figure 15.11 shows the ADCON0 to ADCON2 registers in single sweep
mode.
Table 15.5 Single Sweep Mode Specifications
Item
Specification
Function
Bits SCAN1 to SCAN0 in the ADCON1 register and bits ADGSEL1 and
ADGSEL0 in the ADCON2 register select pins. Analog voltage applied to the
selected pins is converted one-by-one to a digital code
A/D Conversion Start Condition • When the TRG bit in the ADCON0 register is 0 (software trigger)
Set the ADST bit in the ADCON0 register to 1 (A/D conversion started)
• When the TRG bit in the ADCON0 register is 1 (hardware trigger)
The ADTRG pin input changes state from “H” to “L” after setting the ADST bit
to 1 (A/D conversion started)
A/D Conversion Stop Condition • A/D conversion completed(When selecting a software trigger, the ADST bit
is set to 0 (A/D conversion halted)).
• Set the ADST bit to 0
Interrupt Request Generation Timing A/D conversion completed
Analog Input Pin
Select from AN0 to AN1 (2 pins), AN0 to AN3 (4 pins), AN0 to AN5 (6 pins),
AN0 to AN7 (8 pins) (1)
Readout of A/D Conversion Result Readout one of registers AD0 to AD7 that corresponds to the selected pin
NOTE:
1. AN00 to AN07, AN 20 to AN2 7, and AN30 to AN3 2 can be used in the same way as AN0 to AN7.
However, all input pins need to belong to the same group.
•Example when selecting AN0 to AN3 to A/D sweep pins (SCAN1 to SCAN0 = 012)
A/D conversion started
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
A/D interrupt request generated
Figure 15.10 Operation Example in Single Sweep Mode
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sampling
A/D pin conversion
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15. A/D Converter
M16C/29 Group
A/D Control Register 0 (1)
b7
b6
b5
b4
b3
b2
b1
b0
1 0
Symbol
ADCON0
Address
03D6 16
Bit Symbol
After Reset
00000XXX 2
Bit Name
Function
CH0
RW
RW
CH1
Analog input pin select bit
Invalid in single sweep mode
CH2
RW
RW
MD0
b4 b3
A/D operation mode
select bit 0
MD1
1 0: Single sweep mode or Simultaneous
sample sweep mode
RW
RW
TRG
Trigger select bit
0: Software trigger
1: Hardware trigger (ADTRG trigger)
ADST
A/D conversion start flag
0: A/D conversion disabled
1: A/D conversion started
RW
CKS0
Frequency select bit 0
See Table 15.2
RW
RW
NOTE:
1. If the ADCON0 register is rewritten during A/D conversion, the conversion result will be undefined.
A/D Control Register 1 (1)
b7
b6
b5
b4
b3
1
b2
b1
Symbol
ADCON1
b0
0
Bit Symbol
Address
03D7 16
After Reset
00 16
Bit Name
Function
When single sweep mode is selected,
SCAN0
b1 b0
A/D sweep pin select bit
SCAN1
(2)
0 0: AN0 to AN1 (2 pins)
0 1: AN0 to AN3 (4 pins)
1 0: AN0 to AN5 (6 pins)
1 1: AN0 to AN7 (8 pins)
RW
RW
RW
A/D operation mode
select bit 1
0: Other than repeat sweep mode 1
RW
BITS
8/10-bit mode select bit
0: 8-bit mode
1: 10-bit mode
RW
CKS1
Frequency select bit 1
See Table 15.2
RW
1: Vref connected
RW
MD2
(3)
VCUT
Vref connect Bit
(b7-b6)
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
NOTES:
1. If the ADCON1 register is rewritten during A/D conversion, the conversion result will be undefined.
2. AN00 to AN07, AN20 to AN27, and AN30 to AN32 can be used in the same way as AN0 to AN7. Use bits ADGSEL1
and ADGSEL 0 in the ADCON2 register to select the desired pin.
3. If the VCUT bit is reset from 0 (Vref unconnected) to 1 (Vref connected), wait for 1 µs or more before starting A/D
conversion.
A/D Control Register 2(1)
b7
b6
b5
0
b4
b3
0
b2
b1
b0
Symbol
ADCON2
Bit Symbol
SMP
ADGSEL0
ADGSEL1
(b3)
Address
03D416
After Reset
0016
Bit Name
A/D conversion method
select bit
Function
0: Without sample and hold
1: With sample and hold
b2 b1
RW
0 0: Select port P10 group
A/D input group select bit 0 1: Select port P9 group
1 0: Select port P0 group
1 1: Select port P1/P9 group
RW
Reserved bit
RW
Set to 0
RW
CKS2
Frequency select bit 2
See Table 15.2
RW
TRG1
Trigger select bit
Set to 0 in single sweep mode
RW
(b7-b6)
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
NOTE:
1. If the ADCON2 register is rewritten during A/D conversion, the conversion result will be undefined.
Figure 15.11 ADCON0 to ADCON2 Registers in Single Sweep Mode
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15. A/D Converter
M16C/29 Group
15.1.4 Repeat Sweep Mode 0
In repeat sweep mode 0, analog voltages applied to the selected pins are repeatedly converted to a
digital code. Table 15.6 shows the repeat sweep mode 0 specifications. Figure 15.12 shows the operation example in repeat sweep mode 0. Figure 15.13 shows the ADCON0 to ADCON2 registers in repeat
sweep mode 0.
Table 15.6 Repeat Sweep Mode 0 Specifications
Item
Specification
Bits SCAN1 and SCAN0 in the ADCON1 register and bits ADGSEL1 and
ADGSEL0 in the ADCON2 register select pins. Analog voltage applied to the
selected pins is repeatedly converted to a digital code
A/D Conversion Start Condition • When the TRG bit in the ADCON0 register is 0 (software trigger)
Set the ADST bit in the ADCON0 register to 1 (A/D conversion started)
• When the TRG bit in the ADCON0 register is 1 (Hardware trigger)
The ADTRG pin input changes state from “H” to “L” after setting the ADST bit
to 1 (A/D conversion started)
A/D Conversion Stop Condition Set the ADST bit to 0 (A/D conversion halted)
Interrupt Request Generation Timing None generated
Analog Input Pin
Select from AN0 to AN1 (2 pins), AN0 to AN3 (4 pins), AN0 to AN5 (6 pins),
AN0 to AN7 (8 pins) (1)
Readout of A/D Conversion Result Readout one of registers AD0 to AD7 that corresponds to the selected pin
Function
NOTES:
1. AN00 to AN0 7, AN 20 to AN27, and AN30 to AN32 can be used in the same way as AN0 to AN7.
However, all input pins need to belong to the same group.
•Example when selecting AN0 to AN3 to A/D sweep pins (SCAN1 to SCAN0 = 012)
A/D conversion started
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
Figure 15.12 Operation Example in Repeat Sweep Mode 0
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A/D pin input voltage
sampling
A/D pin conversion
15. A/D Converter
M16C/29 Group
A/D Control Register 0 (1)
b7
b6
b5
b4
b3
b2
b1
b0
1 1
Symbol
ADCON0
Address
03D6 16
Bit Symbol
After Reset
00000XXX 2
Bit Name
Function
CH0
RW
RW
CH1
Analog input pin select bit
Invalid in repeat sweep mode 0
CH2
RW
RW
MD0
b4 b3
A/D operation mode
select bit 0
MD1
1 1: Repeat sweep mode 0 or
repeat sweep mode 1
RW
RW
TRG
Trigger select bit
0: Software trigger
1: Hardware trigger (ADTRG trigger)
ADST
A/D conversion start flag
0: A/D conversion disabled
1: A/D conversion started
RW
CKS0
Frequency select bit 0
See Table 15.2
RW
RW
NOTE:
1. If the ADCON0 register is rewritten during A/D conversion, the conversion result will be undefined.
A/D Control Register 1 (1)
b7
b6
b5
b4
b3
1
b2
b1
Symbol
ADCON1
b0
0
Bit Symbol
Address
03D7 16
After Reset
00 16
Bit Name
Function
When repeat sweep mode 0 is selected,
SCAN0
b1 b0
A/D sweep pin select bit
SCAN1
(2)
0 0: AN0 to AN1 (2 pins)
0 1: AN0 to AN3 (4 pins)
1 0: AN0 to AN5 (6 pins)
1 1: AN0 to AN7 (8 pins)
RW
RW
RW
A/D operation mode
select bit 1
0: Other than repeat sweep mode 1
RW
BITS
8/10-bit mode select bit
0: 8-bit mode
1: 10-bit mode
RW
CKS1
Frequency select bit 1
See Table 15.2
RW
1: Vref connected
RW
MD2
(3)
VCUT
Vref connect Bit
(b7-b6)
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
NOTES:
1. If the ADCON1 register is rewritten during A/D conversion, the conversion result will be undefined.
2. AN00 to AN07, AN20 to AN27, and AN30 to AN32 can be used in the same way as AN0 to AN7. Use bits ADGSEL1
and ADGSEL 0 in the ADCON2 register to select the desired pin.
3. If the VCUT bit is reset from 0 (Vref unconnected) to 1 (Vref connected), wait for 1 µs or more before starting A/D
conversion.
A/D Control Register 2(1)
b7
b6
b5
0
b4
b3
0
b2
b1
b0
Symbol
ADCON2
Bit Symbol
SMP
ADGSEL0
ADGSEL1
(b3)
Address
03D416
After Reset
0016
Bit Name
A/D conversion method
select bit
Function
0: Without sample and hold
1: With sample and hold
b2 b1
RW
0 0: Select port P10 group
A/D input group select bit 0 1: Select port P9 group
1 0: Select port P0 group
1 1: Select port P1/P9 group
RW
Reserved bit
RW
Set to 0
RW
CKS2
Frequency select bit 2
See Table 15.2
RW
TRG1
Trigger select bit
Set to 0 in repeat sweep mode 0
RW
(b7-b6)
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
NOTE:
1. If the ADCON2 register is rewritten during A/D conversion, the conversion result will be undefined.
Figure 15.13 ADCON0 to ADCON2 Registers in Repeat Sweep Mode 0
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15. A/D Converter
M16C/29 Group
15.1.5 Repeat Sweep Mode 1
In repeat sweep mode 1, analog voltage is applied to the all selected pins are converted to a digital code,
with mainly used in the selected pins. Table 15.7 shows the repeat sweep mode 1 specifications. Figure
15.14 shows the operation example in repeat sweep mode 1. Figure 15.15 shows registers ADCON0 to
ADCON2 in repeat sweep mode 1.
Table 15.7 Repeat Sweep Mode 1 Specifications
Item
Specification
Bits SCAN1 and SCAN0 in the ADCON1 register and bits ADGSEL1 and
ADGSEL0 in the ADCON2 register mainly select pins. Analog voltage applied
to the all selected pins is repeatedly converted to a digital code
Example : When selecting AN0
Analog voltage is converted to a digital code in the following order
AN0
AN1
AN0
AN2
AN0
AN3, and so on.
A/D Conversion Start Condition • When the TRG bit in the ADCON0 register is 0 (software trigger)
Set the ADST bit in the ADCON0 register to 1 (A/D conversion started)
• When the TRG bit in the ADCON0 register is 1 (hardware trigger)
The ADTRG pin input changes state from “H” to “L” after setting the ADST bit
Function
to 1 (A/D conversion started)
A/D Conversion Stop Condition Set the ADST bit to 0 (A/D conversion halted)
Interrupt Request Generation Timing None generated
Analog Input Pins Mainly Select from AN0 (1 pins), AN0 to AN1 (2 pins), AN0 to AN2 (3 pins), AN0 to
Used in A/D Conversions AN3 (4 pins) (1)
Readout of A/D Conversion Result Readout one of registers AD0 to AD7 that corresponds to the selected pin
NOTES:
1. AN00 to AN07, AN 20 to AN2 7, and AN30 to AN3 2 can be used in the same way as AN0 to AN7.
However, all input pins need to belong to the same group.
•Example when selecting AN0 to A/D sweep pins (SCAN1 to SCAN0 = 002)
A/D conversion started
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
Figure 15.14 Operation Example in Repeat Sweep Mode 1
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A/D pin input voltage
sampling
A/D pin conversion
15. A/D Converter
M16C/29 Group
A/D Control Register 0 (1)
b7
b6
b5
b4
b3
b2
b1
b0
1 1
Symbol
ADCON0
Address
03D6 16
Bit Symbol
After Reset
00000XXX 2
Bit Name
Function
CH0
RW
RW
CH1
Analog input pin select bit
Invalid in repeat sweep mode 1
CH2
RW
RW
MD0
A/D operation mode
select bit 0
MD1
b4 b3
1 1: Repeat sweep mode 0 or
repeat sweep mode 1
RW
RW
TRG
Trigger select bit
0: Software trigger
1: Hardware trigger (ADTRG trigger)
ADST
A/D conversion start flag
0: A/D conversion disabled
1: A/D conversion started
RW
CKS0
Frequency select bit 0
See Table 15.2
RW
RW
NOTE:
1. If the ADCON0 register is rewritten during A/D conversion, the conversion result will be undefined.
A/D Control Register 1 (1)
b7
b6
b5
b4
b3
1
b2
b1
Symbol
ADCON1
b0
0
Bit Symbol
Address
03D7 16
After Reset
00 16
Bit Name
Function
When repeat sweep mode 0 is selected,
SCAN0
b1 b0
A/D sweep pin select bit (2)
SCAN1
0 0: AN0 (1 pin)
0 1: AN0 to AN1 (2 pins)
1 0: AN0 to AN2 (3 pins)
1 1: AN0 to AN3 (4 pins)
RW
RW
RW
MD2
A/D operation mode
select bit 1
1: Repeat sweep mode 1
RW
BITS
8/10-bit mode select bit
0: 8-bit mode
1: 10-bit mode
RW
CKS1
Frequency select bit 1
See Table 15.2
RW
1: Vref connected
RW
(3)
VCUT
Vref connect Bit
(b7-b6)
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
NOTES:
1. If the ADCON1 register is rewritten during A/D conversion, the conversion result will be undefined.
2. AN00 to AN07, AN20 to AN27, and AN30 to AN32 can be used in the same way as AN0 to AN7. Use bits ADGSEL1
and ADGSEL 0 in the ADCON2 register to select the desired pin.
3. If the VCUT bit is reset from 0 (Vref unconnected) to 1 (Vref connected), wait for 1 µs or more before starting A/D
conversion.
A/D Control Register 2(1)
b7
b6
b5
0
b4
b3
0
b2
b1
b0
Symbol
ADCON2
Bit Symbol
SMP
ADGSEL0
ADGSEL1
(b3)
Address
03D416
After Reset
0016
Bit Name
A/D conversion method
select bit
Function
0: Without sample and hold
1: With sample and hold
b2 b1
RW
0 0: Select port P10 group
A/D input group select bit 0 1: Select port P9 group
1 0: Select port P0 group
1 1: Select port P1/P9 group
RW
Reserved bit
RW
Set to 0
RW
CKS2
Frequency select bit 2
See Table 15.2
RW
TRG1
Trigger select bit
Set to 0 in repeat sweep mode 1
RW
(b7-b6)
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
NOTE:
1. If the ADCON2 register is rewritten during A/D conversion, the conversion result will be undefined.
Figure 15.15 ADCON0 to ADCON2 Registers in Repeat Sweep Mode 1
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M16C/29 Group
15. A/D Converter
15.1.6 Simultaneous Sample Sweep Mode
In simultaneous sample sweep mode, analog voltages applied to the selected pins are converted one-byone to a digital code. The input voltages of AN0 and AN1 are sampled simultaneously using two circuits
of sample and hold circuit. Table 15.8 shows the simultaneous sample sweep mode specifications.
Figure 15.16 shows the operation example in simultaneous sample sweep mode. Figure 15.17 shows
registers ADCON0 to ADCON2 and Figure 15.18 shows ADTRGCON registers in simultaneous sample
sweep mode. Table 15.9 shows the trigger select bit setting in simultaneous sample sweep mode. In
simultaneous sample sweep mode, Timer B0 underflow can be selected as a trigger by combining soft___________
ware trigger, ADTRG trigger, Timer B2 underflow, Timer B2 interrupt generation frequency setting counter
underflow or A/D trigger mode of Timer B.
Table 15.8 Simultaneous Sample Sweep Mode Specifications
Item
Specification
Function
Bits SCAN1 and SCAN0 in the ADCON1 register and bits ADGSEL1 and
ADGSEL0 in the ADCON2 register select pins. Analog voltage applied
to the selected pins is converted one-by-one to a digital code. At this time,
the input voltage of AN0 and AN1 are sampled simultaneously.
A/D Conversion Start Condition
When the TRG bit in the ADCON0 register is 0 (software trigger)
Set the ADST bit in the ADCON0 register to 1 (A/D conversion started)
When the TRG bit in the ADCON0 register is 1 (hardware trigger)
The trigger is selected by bits TRG1 and HPTRG0 (See Table 15.9)
The ADTRG pin input changes state from “H” to “L” after setting the ADST
bit to 1 (A/D conversion started)
Timer B0, B2 or Timer B2 interrupt generation frequency setting counter
underflow after setting the ADST bit to 1 (A/D conversion started)
A/D Conversion Stop Condition
A/D conversion completed (If selecting software trigger, the ADST bit is
automatically set to 0 ).
Set the ADST bit to 0 (A/D conversion halted)
Interrupt Generation Timing A/D conversion completed
Analog Input Pin
Select from AN0 to AN1 (2 pins), AN0 to AN3 (4 pins), AN0 to AN5 (6 pins),
or AN0 to AN7 (8 pins) (1)
Readout of A/D conversion result Readout one of registers AN0 to AN7 that corresponds to the selected pin
NOTE:
1. AN00 to AN07, AN 20 to AN27, and AN30 to AN32 can be used in the same way as AN0 to AN7. However, all input
pins need to belong to the same group.
•Example when selecting AN0 to AN3 to A/D pins for sweep (SCAN1 to SCAN0 = 012)
A/D pin input voltage
sampling
A/D pin conversion
A/D conversion started
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
A/D interrupt request generated
Figure 15.16 Operation Example in Simultaneous Sample Sweep Mode
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15. A/D Converter
M16C/29 Group
A/D Control Register 0 (1)
b7
b6
b5
b4
b3
b2
b1
b0
1 1
Symbol
ADCON0
Address
03D6 16
Bit Symbol
After Reset
00000XXX 2
Bit Name
Function
RW
RW
CH0
CH1
Analog input pin select bit
Invalid in repeat sweep mode 0
RW
RW
CH2
MD0
b4 b3
RW
MD1
A/D operation mode
select bit 0
TRG
Trigger select bit
See Table 15.9
RW
ADST
A/D conversion start flag
0: A/D conversion disabled
1: A/D conversion started
RW
CKS0
Frequency select bit 0
See Table 15.2
RW
1 0: Single sweep mode or
simultaneous sample sweep mode
RW
NOTE:
1. If the ADCON0 register is rewritten during A/D conversion, the conversion result will be undefined.
A/D Control Register 1(1)
b7
b6
b5
b4
b3
1
b2
b1
b0
Symbol
ADCON1
0
Bit Symbol
Address
03D7 16
After Reset
00 16
Bit Name
Function
When simultaneous sample sweep mode
is selected,
SCAN0
b1 b0
RW
RW
A/D sweep pin select bit (2) 0 0: AN0 to AN1 (2 pins)
SCAN1
0 1: AN0 to AN3 (4 pins)
1 0: AN0 to AN5 (6 pins)
1 1: AN0 to AN7 (8 pins)
RW
MD2
A/D operation mode
select bit 1
0: Other than repeat sweep mode 1
RW
BITS
8/10-bit mode select bit
0: 8-bit mode
1: 10-bit mode
RW
CKS1
Frequency select bit 1
See Table 15.2
RW
1: Vref connected
RW
(3)
VCUT
Vref connect Bit
(b7-b6)
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
NOTES:
1. If the ADCON1 register is rewritten during A/D conversion, the conversion result will be undefined.
2. AN00 to AN07, AN20 to AN27, and AN30 to AN32 can be used in the same way as AN0 to AN7. Use bits ADGSEL1
and ADGSEL 0 in the ADCON2 register to select the desired pin.
3. If the VCUT bit is reset from 0 (Vref unconnected) to 1 (Vref connected), wait for 1 µs or more before starting A/D
conversion.
A/D Control Register 2(1)
b7
b6
b5
b4
b3
0
b2
b1
b0
1
Symbol
ADCON2
Bit Symbol
SMP
ADGSEL0
Address
03D416
After Reset
0016
Bit Name
A/D conversion method
select bit
Function
Set to 1 in simultaneous sample sweep
mode
b2 b1
RW
RW
0 0: Select port P10 group
A/D input group select bit 0 1: Select port P9 group
1 0: Select port P0 group
1 1: Select port P1/P9 group
RW
Reserved bit
Set to 0
RW
CKS2
Frequency select bit 2
See Table 15.2
RW
TRG1
Trigger select bit
See Table 15.9
RW
(b7-b6)
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
ADGSEL1
(b3)
RW
NOTE:
1. If the ADCON2 register is rewritten during A/D conversion, the conversion result will be undefined.
Figure 15.17 ADCON0 to ADCON2 Registers in Simultaneous Sample Sweep Mode
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REJ09B0101-0112
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M16C/29 Group
15. A/D Converter
A/D Trigger Control Register (1)
b7
b6
b5
b4
b3
b2
0
b1
Symbol
ADTRGCON
b0
1 1
Bit Symbol
Address
03D216
After Reset
0016
Bit Name
Function
A/D operation mode select 1: Simultaneous sample sweep mode or
delayed trigger mode 0, 1
bit 2
RW
DTE
A/D operation mode select
0: Other than delayed trigger mode 0, 1
bit 3
RW
HPTRG0
AN0 trigger select bit
See Table 15.9
RW
HPTRG1
AN1 trigger select bit
Set to 0 in simultaneous sample sweep
mode
RW
(b7-b4)
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
NOTE:
1. If ADTRGCON is rewritten during A/D conversion, the conversion result will be undefined.
Figure 15.18 ADTRGCON Register in Simultaneous Sample Sweep Mode
Table 15.9 Trigger Select Bit Setting in Simultaneous Sample Sweep Mode
TRIGGER
HPTRG0
TRG
TRG1
0
-
-
Software trigger
1
-
1
Timer B0 underflow (1)
1
0
0
ADTRG
1
1
0
Timer B2 or Timer B2 interrupt generation frequency setting
counter underflow (2)
NOTES:
1. A count can be started for Timer B2, Timer B2 interrupt generation frequency
setting counter underflow or the INT5 pin falling edge as count start
conditions of Timer B0.
2. Select Timer B2 or Timer B2 interrupt generation frequency setting counter
using the TB2SEL bit in the TB2SC register.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
RW
SSE
page 240 of 458
15. A/D Converter
M16C/29 Group
15.1.7 Delayed Trigger Mode 0
In delayed trigger mode 0, analog voltages applied to the selected pins are converted one-by-one to a
digital code. The delayed trigger mode 0 used in combination with A/D trigger mode of Timer B. The
Timer B0 underflow starts a single sweep conversion. After completing the AN0 pin conversion, the AN1
pin is not sampled and converted until the Timer B1 underflow is generated. When the Timer B1 underflow is generated, the single sweep conversion is restarted with the AN1 pin. Table 15.10 shows the
delayed trigger mode 0 specifications. Figure 15.19 shows the operation example in delayed trigger
mode 0. Figures 15.20 and 15.21 show each flag operation in the ADSTAT0 register that corresponds to
the operation example. Figure 15.22 shows registers ADCON0 to ADCON2 in delayed trigger mode 0.
Figure 15.23 shows the ADTRGCON register in delayed trigger mode 0 and Table 15.11 shows the
trigger select bit setting in delayed trigger mode 0.
Table 15.10 Delayed Trigger Mode 0 Specifications
Item
Specification
Function
Bits SCAN1 and SCAN0 in the ADCON1 register and bits ADGSEL1 and ADGSEL0
in the ADCON2 register select pins. Analog voltage applied to the input voltage of
the selected pins are converted one-by-one to the digital code. At this time, timer B0
underflow generation starts AN0 pin conversion. Timer B1 underflow generation
starts conversion after the AN1 pin. (1)
A/D Conversion Start
AN0 pin conversion start condition
•When Timer B0 underflow is generated if Timer B0 underflow is generated again
before Timer B1 underflow is generated , the conversion is not affected
•When Timer B0 underflow is generated during A/D conversion of pins after the
AN1 pin, conversion is halted and the sweep is restarted from the AN0 pin again
AN1 pin conversion start condition
•When Timer B1 underflow is generated during A/D conversion of the AN0 pin, the
input voltage of the AN1 pin is sampled. The AN1 conversion and the rest of the
sweep start when AN0 conversion is completed.
•When single sweep conversion from the AN0 pin is completed
•Set the ADST bit to 0 (A/D conversion halted)(2)
A/D conversion completed
A/D Conversion Stop
Condition
Interrupt request
generation timing
Analog input pin
Readout of A/D conversion
Select from AN0 to AN1 (2 pins), AN0 to AN3 (4 pins), AN0 to AN5 (6 pins)
and AN0 to AN7 (8 pins)(3)
Readout one of registers AN0 to AN7 that corresponds to the selected pins
result
NOTES:
1. Set the larger value than the value of the timer B0 register to the timer B1 register. The count source for timer B0
and timer B1 must be the same.
2. Do not write 1 (A/D conversion started) to the ADST bit in delayed trigger mode 0. When write 1, unexpected
interrupts may be generated.
3. AN00 to AN07, AN 20 to AN27, and AN30 to AN32 can be used in the same way as AN0 to AN7. However, all input
pins need to belong to the same group.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
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M16C/29 Group
15. A/D Converter
•Example when selecting AN0 to AN3 to A/D sweep pins (SCAN1 to SCAN0 = 012)
•Example 1: When Timer B1 underflow is generated during AN0 pin conversion
Timer B0 underflow
A/D pin conversion
Timer B1 underflow
AN0
AN1
AN2
AN3
•Example 2: When Timer B1 underflow is generated after AN0 pin conversion
Timer B0 underflow
Timer B1 underflow
AN0
AN1
AN2
AN3
•Example 3: When Timer B0 underflow is generated during A/D conversion of any pins except AN0 pin
Timer B0 underflow
Timer B0 underflow
(Abort othrt pins conversion)
Timer B1 underflow
Timer B1 under flow
AN0
AN1
AN2
AN3
•Example 4: When Timer B0 underflow is generated again before Timer B1 underflow is generated
after Timer B0 underflow generation
Timer B0 underflow
Timrt B0 underflow
(An interrupt does not affect A/D conversion)
Timer B1 underflow
AN0
AN1
AN2
AN3
Figure 15.19 Operation Example in Delayed Trigger Mode 0
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
A/D pin input
voltage sampling
page 242 of 458
15. A/D Converter
M16C/29 Group
•Example when selecting AN0 to AN3 to A/D sweep pins (SCAN1 to SCAN0 = 012)
•Example 1: When Timer B1 underflow is generated during AN0 pin conversion
A/D pin input
voltage sampling
Timer B0 underflow
Timer B1 underflow
A/D pin conversion
AN0
AN1
AN2
AN3
ADST flag
1
ADERR0 flag
1
0
Do not set to 1 by program
0
ADERR1 flag
1
ADTCSF flag
1
0
0
1
ADSTT0 flag
0
ADSTT1 flag
1
0
ADSTRT0 flag
1
0
ADSTRT1 flag
1
IR bit in the ADIC
register
1
Set to 0 by program
0
0
Set to 0 by an interrupt request acknowledgement or a program
•Example 2: When Timer B1 underflow is generated after AN0 pin conversion
Timer B0 underflow
Timer B1 underflow
AN0
AN1
AN2
AN3
ADST flag
1
ADERR0 flag
1
0
Do not set to 1 by program
0
ADERR1 flag
1
ADTCSF flag
1
0
0
ADSTT0 flag
1
0
ADSTT1 flag
1
0
ADSTRT0 flag
1
0
ADSTRT1 flag
1
IR bit in the ADIC
register
1
Set to 0 by program
0
0
Set to 0 by an interrupt request acknowledgement or a program
ADST flag: Bit 6 in the ADCON0 register
ADERR0, ADERR1, ADTCSF, ADSTT0, ADSTT1, ADSTRT0 and ADSTRT1 flag: bits 0, 1, 3, 4, 5, 6 and 7 in the ADSTAT0 register
Figure 15.20 Each Flag Operation in ADSTAT0 Register Associated with the Operation
Example in Delayed Trigger Mode 0 (1)
Rev. 1.12 Mar.30, 2007
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M16C/29 Group
15. A/D Converter
•Example 3: When Timer B0 underflow is generated during A/D pin conversion of any pins except AN0 pin
Timer B0 underflow
Timer B1 underflow
Timer B0 underflow
(Abort othrt pins conversion )
Timer B1 underflow
A/D pin input
voltage sampling
A/D pin conversion
AN0
AN1
AN2
AN3
1
ADST flag
0
ADERR0 flag
1
ADERR1 flag
1
ADTCSF flag
1
Do not set to 1 by program
0
0
0
ADSTT0 flag
1
0
ADSTT1 flag
1
0
ADSTRT0 flag
1
0
ADSTRT1 flag
Set to 0 by program
1
0
IR bit in the ADIC1
register
0
Set to 0 by interrupt request acknowledgement or a program
ADST flag: Bit 6 in the ADCON0 register
ADERR0, ADERR1, ADTCSF, ADSTT0, ADSTT1, ADSTRT0 and ADSTRT1 flag: bits 0, 1, 3, 4, 5, 6 and 7 in the ADSTAT0 register
•Example 4: After Timer B0 underflow is generated and when Timer B0 underflow is generated again
before Timer B1 underflow is genetaed
Timer B0 underflow
Timrt B0 underflow
(An interrupt does not affect A/D conversion)
Timer B1 underflow
AN0
AN1
AN2
AN3
ADST flag
1
ADERR0 flag
1
0
A/D pin input
voltage sampling
A/D pin conversion
Do not set to 1 by program
0
ADERR1 flag
1
ADTCSF flag
1
0
0
ADSTT0 flag
1
0
ADSTT1 flag
1
0
ADSTRT0 flag
1
0
ADSTRT1 flag
Set to 0 by program
1
0
IR bit in the ADIC
register
1
0
Set to 0 by interrupt request acknowledgement or a program
ADST flag: Bit 6 in the ADCON0 register
ADERR0, ADERR1, ADTCSF, ADSTT0, ADSTT1, ADSTRT0 and ADSTRT1 flag: bits 0, 1, 3, 4, 5, 6 and 7 in the ADSTAT0 register
Figure 15.21 Each Flag Operation in ADSTAT0 Register Associated with the Operation
Example in Delayed Trigger Mode 0 (2)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
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15. A/D Converter
M16C/29 Group
A/D Control Register 0 (1)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
ADCON0
0 0 0 1 1 1
Address
03D6 16
Bit Symbol
CH0
After Reset
00000XXX 2
Bit Name
Function
b2 b1 b0
Analog input pin
select bit
1 1 1: Set to 111b in delayed trigger
mode 0
RW
RW
CH1
RW
CH2
MD0
RW
b4 b3
RW
MD1
A/D operation mode
select bit 0
TRG
Trigger select bit
ADST
A/D conversion start flag
(2)
0: A/D conversion disabled
1: A/D conversion started
RW
Frequency select bit 0
Refer to Table 15.2
RW
CKS0
0 0: One-shot mode or delayed trigger mode
0,1
Refer to Table 15.11
RW
RW
NOTES:
1. If the ADCON0 register is rewritten during A/D conversion, the conversion result will be undefined.
2. Do not write 1 in delayed trigger mode 0. When write, set to 0.
A/D Control Register 1 (1)
b7
b6
b5
b4
b3
1
b2
b1
b0
Symbol
ADCON1
0
Address
03D716
Bit Symbol
SCAN0
After Reset
0016
Bit Name
A/D sweep pin
select bit (2)
Function
When selecting delayed trigger sweep mode 0
b1 b0
0 0: AN 0 to AN 1 (2 pins)
0 1: AN 0 to AN 3 (4 pins)
1 0: AN 0 to AN 5 (6 pins)
1 1: AN 0 to AN 7 (8 pins)
SCAN1
RW
RW
RW
A/D operation mode
select bit 1
0: Any mode other than repeat sweep
mode 1
RW
8/10-bit mode select bit
0: 8-bit mode
1: 10-bit mode
RW
CKS1
Frequency select bit 1
Refer to Table 15.2
RW
VCUT
Vref connect bit
1: Vref connected
RW
MD2
BITS
(b7-b6)
(3)
Nothing is assigned. If necessary, set to 0.
When read, its content is 0
NOTES:
1. If the ADCON1 register is rewritten during A/D conversion, the conversion result will be undefined.
2. AN0 0 to AN0 7, AN2 0 to AN2 7, and AN3 0 to AN3 2 can be used in the same way as AN 0 to AN 7. Use bits ADGSEL1 and
ADGSEL0 in the ADCON2 register to select the desired pin.
3. If the VCUT bit is reset from 0 (Vref unconnected) to 1 (Vref connected), wait for 1 µs or more before starting
A/D conversion.
A/D Control Register 2 (1)
b7
b6
b5
0
b4
b3
0
b2
b1
b0
Symbol
1
ADCON2
Bit Symbol
SMP
ADGSEL0
Address
03D416
CKS2
TRG1
(b7-b6)
0016
Bit Name
A/D conversion method
select bit (2)
A/D input group
select bit
Function
1: With sample and hold
b2 b1
Reserved bit
Set to 0
RW
Frequency select bit 2
Refer to Table 15.2
Trigger select bit 1
Refer to Table 15.11
Nothing is assigned. If necessary, set to 0.
When read, its content is 0
Figure 15.22 ADCON0 to ADCON2 Registers in Delayed Trigger Mode 0
page 245 of 458
RW
RW
NOTES:
1. If the ADCON2 register is rewritten during A/D conversion, the conversion result will be undefined.
2. Set to 1 in delayed trigger mode 0.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
RW
0 0: Select port P10 group
0 1: Select port P9 group
1 0: Select port P0 group
1 1: Select port P1/P9 group
ADGSEL1
(b3)
After Reset
RW
RW
RW
M16C/29 Group
15. A/D Converter
A/D Trigger Control Register (1)
b7
b6
b5
b4
b3
b2
b1
Symbol
ADTRGCON
b0
1 1 1 1
Bit Symbol
Address
03D216
After Reset
0016
Bit Name
Function
SSE
A/D operation mode select Simultaneous sample sweep mode or
bit 2
delayed trigger mode 0, 1
RW
DTE
A/D operation mode select
bit 3
Delayed trigger mode 0, 1
RW
HPTRG0
AN0 trigger select bit
See Table 15.11
RW
HPTRG1
AN1 trigger select bit
See Table 15.11
RW
(b7-b4)
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
NOTE:
1. If ADTRGCON is rewritten during A/D conversion, the conversion result will be undefined.
Figure 15.23 ADTRGCON Register in Delayed Trigger Mode 0
Table 15.11 Trigger Select Bit Setting in Delayed Trigger Mode 0
TRG
TRG1
HPTRG0
HPTRG1
0
0
1
1
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
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page 246 of 458
Trigger
Timer B0, B1 underflow
15. A/D Converter
M16C/29 Group
15.1.8 Delayed Trigger Mode 1
In delayed trigger mode 1, analog voltages applied to the selected pins are converted one-by-one to a
___________
digital code. When the input of the ADTRG pin (falling edge) changes state from “H” to “L”, a single sweep
conversion is started. After completing the AN0 pin conversion, the AN1 pin is not sampled and converted
___________
until the second ADTRG pin falling edge is generated. When the second ADTRG falling edge is generated,
the single sweep conversion of the pins after the AN1 pin is restarted. Table 15.12 shows the delayed
trigger mode 1 specifications. Figure 15.24 shows the operation example of delayed trigger mode 1.
Figure 15.25 and 15.26 show each flag operation in the ADSTAT0 register that corresponds to the
operation example. Figure 15.27 shows registers ADCON0 to ADCON2 in delayed trigger mode 1.
Figure 15.28 shows the ADTRGCON register in delayed trigger mode 1. Table 15.13 shows the trigger
select bit setting in delayed trigger mode 1.
Table 15.12 Delayed Trigger Mode 1 Specifications
Item
Function
Specification
Bits SCAN1 and SCAN0 in the ADCON1 register and bits ADGSEL1 and ADGSEL0
in the ADCON2 register select pins. Analog voltages applied to the selected
___________
pins are converted one-by-one to a digital code. At this time, the ADTRG pin
___________
falling edge starts AN0 pin conversion and the second ADTRG pin falling edge
starts conversion of the pins after AN1 pin
A/D Conversion Start
Condition
AN0 pin conversion start condition
___________
The ADTRG pin input changes state from “H” to “L” (falling edge) (1)
AN1 pin conversion start condition (2)
___________
The ADTRG pin input changes state from “H” to “L” (falling edge)
___________
•When the second ADTRG pin falling edge is generated during A/D conversion of
___________
the AN0 pin, input voltage of AN1 pin is sampled or after at the time of ADTRG
falling edge. The conversion of AN1 and the rest of the sweep starts when AN0
conversion is completed.
___________
•When the ADTRG pin falling edge is generated again during single sweep
conversion of pins after the AN1 pin, the conversion is not affected
A/D Conversion Stop
Condition
Interrupt Request
•A/D conversion completed
•Set the ADST bit to 0 (A/D conversion halted) (3)
Single sweep conversion completed
Generation Timing
Analog Input Pin
Select from AN0 to AN1 (2 pins), AN0 to AN3 (4 pins), AN0 to AN5 (6 pins)
and AN0 to AN7 (8 pins) (4)
Readout of A/D Conversion Result Readout one of registers AN0 to AN7 that corresponds to the selected pins
NOTES:
___________
1. Do not generate the next ADTRG pin falling edge after the AN1 pin conversion is started until all selected pins
___________
complete A/D conversion. When an ADTRG pin falling edge is generated again during A/D conversion, its trigger
___________
is ignored. The falling edge of ADTRG pin, which was input after all selected pins complete A/D conversion, is
considered to be the next AN0 pin conversion start condition.
___________
___________
2. The ADTRG pin falling edge is detected synchronized with the operation clock fAD. Therefore, when the ADTRG pin
___________
falling edge is generated in shorter periods than fAD, the second ADTRG pin falling edge may not be detected. Do
___________
not generate the ADTRG pin falling edge in shorter periods than fAD.
3. Do not write 1 (A/D conversion started) to the ADST bit in delayed trigger mode 1. When write 1,unexpected
interrupts may be generated.
4. AN00 to AN07, AN 20 to AN27, and AN30 to AN32 can be used in the same way as AN0 to AN7. However, all input
pins need to belong to the same group.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
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M16C/29 Group
15. A/D Converter
•Example when selecting AN0 to AN3 to A/D sweep pins (SCAN1 to SCAN0 = 012)
•Example 1: When ADTRG pin falling edge is generated during AN0 pin conversion
A/D pin input
voltage sampling
A/D pin conversion
ADTRG pin input
AN0
AN1
AN2
AN3
•Example 2: When ADTRG pin falling edge is generated again after AN0 pin conversion
ADTRG pin input
AN0
AN1
AN2
AN3
•Example 3: When ADTRG pin falling edge is generated more than two times after AN0 pin conversion
ADTRG pin input
(valid after single sweep conversion)
AN0
AN1
AN2
AN3
(invalid)
Figure 15.24 Operation Example in Delayed Trigger Mode1
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 248 of 458
15. A/D Converter
M16C/29 Group
•Example when selecting AN0 to AN3 to A/D sweep pins (SCAN1 to SCAN0 = 012)
•Example 1: When ADTRG pin falling edge is generated during AN0 pin conversion
A/D pin input
voltage sampling
ADTRG pin input
A/D pin conversion
AN0
AN1
AN2
AN3
ADST flag
1
ADERR0 flag
1
0
Do not set to 1 by program
0
ADERR1 flag
1
ADTCSF flag
1
0
0
ADSTT0 flag
1
0
ADSTT1 flag
1
0
ADSTRT0 flag
1
0
ADSTRT1 flag
Set to 0 by program
1
0
IR bit in the ADIC 1
register
0
Set to 0 by interrupt request acknowledgement or a program
•Example 2: When ADTRG pin falling edge is generated again after AN0 pin conversion
ADTRG pin input
AN0
AN1
AN2
AN3
ADST flag
1
ADERR0 flag
1
0
Do not set to 1 by program
0
ADERR1 flag
1
ADTCSF flag
1
0
0
ADSTT0 flag
1
0
ADSTT1 flag
1
0
ADSTRT0 flag
1
0
ADSTRT1 flag
Set to 0 by program
1
0
IR bit in the ADIC
register
1
0
Set to 0 by interrupt request acknowledgment or a program
ADST flag: Bit 6 in the ADCON0 register
ADERR0, ADERR1, ADTCSF, ADSTT0, ADSTT1, ADSTRT0 and ADSTRT1 flag: bits 0, 1, 3, 4, 5, 6 and 7 in the ADSTAT0 register
Figure 15.25 Each Flag Operation in ADSTAT0 Register Associated with the Operation Example
in Delayed Trigger Mode 1 (1)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
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M16C/29 Group
15. A/D Converter
•Example 3: When ADTRG input falling edge is generated more than two times after AN0 pin conversion
A/D pin input
voltage sampling
A/D pin conversion
ADTRG pin input
(valid after single sweep conversion)
AN0
AN1
AN2
AN3
ADST flag
1
ADERR0 flag
1
0
(invalid)
Do not set to 1 by program
0
ADERR1 flag
1
ADTCSF flag
1
0
0
ADSTT0 flag
1
0
ADSTT1 flag
1
0
ADSTRT0 flag
1
0
ADSTRT1 flag
Set to 0 by program
1
0
IR bit in the ADIC
register
1
0
Set to 0 when interrupt request acknowledgement or a program
ADST flag: Bit 6 in the ADCON0 register
ADERR0, ADERR1, ADTCSF, ADSTT0, ADSTT1, ADSTRT0 and ADSTRT1 flag: bits 0, 1, 3, 4, 5, 6 and 7 in the ADSTAT0 register
Figure 15.26 Each Flag Operation in ADSTAT0 Register Associated with the Operation Example
in Delayed Trigger Mode 1 (2)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 250 of 458
15. A/D Converter
M16C/29 Group
A/D Control Register 0 (1)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
ADCON0
0 0 0 1 1 1
Address
03D616
Bit Symbol
CH0
After Reset
00000XXX 2
Bit Name
Function
b2 b1 b0
Analog input pin
select bit
1 1 1: Set to 111b in delayed trigger
mode 1
RW
CH2
MD1
TRG
RW
RW
CH1
MD0
RW
A/D operation mode
select bit 0
Trigger select bit
b4 b3
0 0 : One-shot mode or delayed trigger mode
0,1
Refer to Table 15.13
RW
RW
RW
ADST
A/D conversion start flag
(2)
0 : A/D conversion disabled
1 : A/D conversion started
RW
CKS0
Frequency select bit 0
Refer to Table 15.2
RW
NOTES:
1. If the ADCON0 register is rewritten during A/D conversion, the conversion result will be undefined.
2. Do not write 1 in delayed trigger mode 1. If necessary, set to 0.
A/D Control Register 1 (1)
b7
b6
b5
b4
b3
1
b2
b1
b0
Symbol
ADCON1
0
Bit Symbol
SCAN0
Address
03D716
After Reset
0016
Bit Name
A/D sweep pin
select bit (2)
Function
When selecting delayed trigger mode 1
b1 b0
0 0: AN 0 to AN 1 (2 pins)
0 1: AN 0 to AN 3 (4 pins)
1 0: AN 0 to AN 5 (6 pins)
1 1: AN 0 to AN 7 (8 pins)
SCAN1
RW
RW
RW
A/D operation mode
select bit 1
0: Any mode other than repeat sweep
mode 1
RW
8/10-bit mode select bit
0: 8-bit mode
1: 10-bit mode
RW
CKS1
Frequency select bit 1
Refer to Table 15.2
RW
VCUT
Vref connect bit
1: Vref connected
RW
MD2
BITS
(3)
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined
(b7-b6)
NOTES:
1. If the ADCON1 register is rewritten during A/D conversion, the conversion result will be undefined.
2. AN0 0 to AN0 7, AN20 to AN2 7, and AN3 0 to AN3 2 can be used in the same way as AN 0 to AN 7. Use bits ADGSEL1 and
ADGSET0 in the ADCON2 register to select the desired pin.
3. If the VCUT bit is reset from 0 (Vref unconnected) to 1 (Vref connected), wait for 1 µs or more before starting
A/D conversion.
A/D Control Register 2 (1)
b7
b6
b5
1
b4
b3
0
b2
b1
b0
Symbol
1
ADCON2
Bit Symbol
SMP
ADGSEL0
Address
03D4 16
Bit Name
A/D conversion method
select bit (2)
A/D input group
select bit
CKS2
TRG1
(b7-b6)
Function
1: With sample and hold
b2 b1
Reserved bit
Set to 0
RW
Frequency select bit 2
Refer to Table 15.2
Trigger select bit 1
Refer to Table 15.13
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
Figure 15.27 ADCON0 to ADCON2 Registers in Delayed Trigger Mode 1
page 251 of 458
RW
RW
NOTES:
1. If the ADCON2 register is rewritten during A/D conversion, the conversion result will be undefined.
2. Set to 1 in delayed trigger mode 1.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
RW
0 0: Select port P10 group
0 1: Select port P9 group
1 0: Select port P0 group
1 1: Select port P1/P9 group
ADGSEL1
(b3)
After Reset
0016
RW
RW
RW
M16C/29 Group
15. A/D Converter
A/D Trigger Control Register (1)
b7
b6
b5
b4
b3
b2
b1
b0
0 0 1 1
Symbol
ADTRGCON
Bit Symbol
Address
03D216
After Reset
0016
Bit Name
Function
SSE
A/D operation mode select Simultaneous sample sweep mode or
delayed trigger mode 0, 1
bit 2
RW
DTE
A/D operation mode select
bit 3
Delayed trigger mode 0, 1
RW
HPTRG0
AN0 trigger select bit
See Table 15.13
RW
HPTRG1
AN1 trigger select bit
See Table 15.13
RW
(b7-b4)
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
NOTE:
1. If ADTRGCON is rewritten during A/D conversion, the conversion result will be undefined.
Figure 15.28 ADTRGCON Register in Delayed Trigger Mode 1
Table 15.13 Trigger Select Bit Setting in Delayed Trigger Mode 1
TRG
TRG1
HPTRG0
HPTRG1
0
1
0
0
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REJ09B0101-0112
RW
page 252 of 458
Trigger
ADTRG
15. A/D Converter
M16C/29 Group
15.2 Resolution Select Function
The BITS bit in the ADCON1 register determines the resolution. When the BITS bit is set to 1 (10-bit
precision), the A/D conversion result is stored into bits 0 to 9 in the ADi register (i=0 to 7). When the BITS
bit is set to 0 (8-bit precision), the A/D conversion result is stored into bits 7 to 0 in the ADi register.
15.3 Sample and Hold
When the SMP bit in the ADCON 2 register is set to 1 (with the sample and hold function), A/D conversion
rate per pin increases to 28 φAD cycles for 8-bit resolution or 33 φAD cycles for 10-bit resolution. The
sample and hold function is available in one-shot mode, repeat mode, single sweep mode, repeat sweep
mode 0 and repeat sweep mode 1. In these modes, start A/D conversion after selecting whether the
sample and hold circuit is to be used or not. In simultaneous sample sweep mode, delayed trigger mode
0 or delayed trigger mode, set to use the Sample and Hold function before starting A/D conversion.
15.4 Power Consumption Reducing Function
When the A/D converter is not used, the VCUT bit in the ADCON1 register isolates the resistor ladder of
the A/D converter from the reference voltage input pin (VREF). Power consumption is reduced by shutting
off any current flow into the resistor ladder from the VREF pin.
When using the A/D converter, set the VCUT bit to 1 (Vref connected) before setting the ADST bit in the
ADCON0 register to 1 (A/D conversion started). Do not set the ADST bit and VCUT bit to 1 simultaneously, nor set the VCUT bit to 0 (Vref unconnected) during A/D conversion.
Rev. 1.12 Mar.30, 2007
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M16C/29 Group
15. A/D Converter
15.5 Output Impedance of Sensor under A/D Conversion
To carry out A/D conversion properly, charging the internal capacitor C shown in Figure 15.29 has to be
completed within a specified period of time. T (sampling time) as the specified time. Let output impedance of sensor equivalent circuit be R0, MCU’s internal resistance be R, precision (error) of the A/D
converter be X, and the A/D converter’s resolution be Y (Y is 1024 in the 10-bit mode, and 256 in the 8bit mode).
VC is generally VC = VIN{1-e
And when t = T,
VC=VINe
1
c(R0+R)
1
c(R0+R)
X
Y
t
}
VIN=VIN(1-
T
X
Y
)
X
Y
=
1
X
T = ln
Y
C(R0+R)
T
R0 = -R
C•ln X
Y
-
Hence,
Figure 15.29 shows analog input pin and externalsensor equivalent circuit. When the difference between VIN and VC becomes 0.1 LSB, we find impedance R0 when voltage between pins. VC changes
from 0 to VIN-(0.1/1024) VIN in timer T. (0.1/1024) means that A/D precision drop due to insufficient
capacitor chage is held to 0.1LSB at time of A/D conversion in the 10-bit mode. Actual error however is
the value of absolute precision added to 0.1LSB. When f(XIN) = 10MHz, T=0.3µs in the A/D conversion
mode with sample & hold. Output inpedance R0 for sufficiently charging capacitor C within time T is
determined as follows.
T = 0.3µs, R = 7.8kΩ, C = 1.5pF, X = 0.1, and Y = 1024. Hence,
0.3X10-6
0.1
1.5X10-12•ln
1024
R0 = -
- 7.8 X 103 ≅ 13.9 X 103
Thus, the allowable output impedance of the sensor circuit capable of thoroughly driving the A/D converter turns out of be approximately 13.9kΩ.
MCU
Sensor equivalent
circuit
R0
VIN
R (7.8kΩ)
(1)
(1)
Sampling time
C (1.5pF)
VC
3
Sample-and-hold function enabled: φAD
Sample-and-hold function disabled: 2
φAD
NOTE:
1. Reference value
Figure 15.29 Analog Input Pin and External Sensor Equivalent Circuit
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16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
16. Multi-master I2C bus Interface
The multi-master I2C bus interface is a serial communication circuit based on Philips I2C bus data transfer
format, equipped with arbitration lost detection and synchronous functions. Figure 16.1 shows a block
diagram of the multi-master I2C bus interface and Table 16.1 lists the multi-master I2C bus interface functions.
The multi-master I2C bus interface consists of the S0D0 register, the S00 register, the S20 register, the
S3D0 register, the S4D0 register, the S10 register, the S2D0 register and other control circuits.
Figures 16.2 to 16.8 show the registers associated with the multi-master I2C bus.
Table 16.1 Multi-master I2C bus interface functions
Item
Format
Communication mode
SCL clock frequency
I/O pin
NOTE:
1. VIIC=I2C system clock
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REJ09B0101-0112
Function
Based on Philips
bus standard:
7-bit addressing format
High-speed clock mode
Standard clock mode
Based on Philips I2C bus standard:
I2C
page 255 of 458
Master transmit
Master receive
Slave transmit
Slave receive
16.1kHz to 400kHz (at VIIC (1)= 4MHz)
Serial data line
SDAMM(SDA)
Serial clock line SDLMM(SCL)
S3D0
b7
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Figure 16.1 Block diagram of multi-master I2C bus interface
b0
SIM
(SCL)
Noise
elimination
circuit
Clock
control
circuit
BB
circuit
AL
circuit
Data
control
circuit
I C system clock
(VIIC)
2
Clock division
System clock select circut
fIIC
TISS
S10
b7
S20
Interrupt
generation
circuit
PCLK0=0
PCLK0=1
b0
f1
f2
Bit counter
A L S ES0 B C 2 B C 1 B C 0
S1D0
b0
I2C0 Status Registers
AL AAS AD0 LRB
(I2C IRQ)
I 2C bus interface
Interrupt request signal
I2C0 control registers 0
MST TRX B B P I N
b7
b0
b7
T OE
Time-out detection
circuit
TOF
Internal data bus
b0
b0
ICK 4 ICK 3 ICK 2 TOSEL
I C0 Control Registers 2
S4D0
2
2
I C0 data shift registers
Address comparator
SAD5 SAD4 SAD3 SAD2 SAD1 SAD0
I2C0 address registers
ACK ACK FAST CCR4 CCR3 CCR2 CCR1 CCR0
CLK BIT MODE
S00
b7
S0D0
SAD6
b7
I C0 clock control registers
2
Interrupt request signal
(S CL S DA IRQ)
SIP SSC4 SSC3 SSC2 SSC1 SSC0
Noise
elimination
circuit
Interrupt
generation
circuit
WIT
start/stop condition control register
Serial
clock
I2C0
STSP
SIS
SEL
S2D0
(SDA)
Serial Data
ICK1 ICK0 SCLM SDAM
I2C0 Control Register 1
M16C/29 Group
16. MULTI-MASTER I2C bus INTERFACE
16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
2
I C0 Address Register
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
S0D0
0
Bit Symbol
(b0)
Address
02E216
Bit Name
Reserved bit
page 257 of 458
Set to 0
RW
RW
RW
SAD1
RW
SAD3
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REJ09B0101-0112
Function
SAD0
SAD2
Figure 16.2 S0D0 Register
After Reset
00 16
Slave address
Compare with received
address data
RW
RW
SAD4
RW
SAD5
RW
SAD6
RW
16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
I2C0 Data Shift Register
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
S00
Address
02E016
After Reset
XX16
Function
RW
Transmit/receive data are stored.
In master transmit mode, the start condition/stop condition are triggered by writing data
to the register (refer to 16.9 START Condition Generation Method and 16.11 STOP
Condition Generation Method). Start transmitting/receiving data while synchronizing
with SCL
RW(1)
NOTE:
1. Write is enabled only when the ES0 bit in the S1D0 register is 1 (I2C bus interface is enabled). Write the transmit data after
the receive data is read because the S00 register is used to store both the transmit and receive data. When the S00 register
is set, bits BC2 to BC0 in the S1D0 register are set to 0002, while bits LRB, AAS, and AL in the S10 register are set to 0
respectively.
I 2 C0 Clock Control Register
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
S20
Bit Symbol
CCR0
Bit Name
S CL Frequency Control Bits
After Reset
00 16
Function
See Table 16.3
RW
RW
CCR1
RW
CCR2
RW
CCR3
RW
CCR4
RW
FAST
MODE
ACKBIT
ACK-CLK
Figure 16.3 S00 and S20 Registers
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REJ09B0101-0112
Address
02E416
page 258 of 458
S CL Mode Specification Bit
0: Standard clock mode
1: High-speed clock mode
RW
ACK Bit
0: ACK is returned
1: ACK is not returned
RW
ACK Clock Bit
0: No ACK clock
1: With ACK clock
RW
16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
I 2 C0 Control Register 0
b7
b3
b2
b1
b0
Symbol
S1D0
Bit Symbol
BC0
Address
02E316
Bit Name
Bit counter
(Number of transmit/receive
bits) (1)
BC1
BC2
Function
RW
b2 b1 b0
0 0 0: 8
0 0 1: 7
0 1 0: 6
0 1 1: 5
1 0 0: 4
1 0 1: 3
1 1 0: 2
1 1 1: 1
RW
RW
RW
ES0
I2C bus interface
enable bit
0: Disabled
1: Enabled
RW
ALS
Data format select bit
0: Addressing format
1: Free data format
RW
(b5)
Reserved bit
Set to 0
RW
IHR
I2C bus interface
reset bit
0: Reset release (automatic)
1: Reset
RW
TISS
I2C bus interface pin
input level select bit
0: I2C bus input
1: SMBUS input
RW
NOTE:
1.In the following status, the bit counter is set to 000 automatically
•Start condition/stop condition are detected
•Immediately after the completion of 1-byte data transmit
•Immediately after the completion of 1-byte data receive
Figure 16.4 S1D0 Register
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REJ09B0101-0112
After Reset
00 16
page 259 of 458
16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
I 2 C0 Status Register
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
S10
Bit Symbol
Address
02E816
Bit Name
After Reset
0001000X 2
Function
RW
Last receive bit
0: Last bit = 0
1: Last bit = 1
RO(1)
General call detecting flag
0: No general call detected
1: General call detected
RO
Slave address comparison flag
0: No address matched
1: Address matched
RO
AL
Arbitration lost detection flag
0: Not detected
1: Detected
RO(2)
PIN
I 2 C bus interface interrupt
request bit
0: Interrupt request issued
1: No interrupt request issued
RO
BB
Bus busy flag
0: Bus free
1: Bus busy
RO(1)
TRX
Communication mode select
bits 0
0: Receive mode
1: Transmit mode
RW(3)
MST
Communication mode select
bit 1
0: Slave mode
1: Master mode
RW(3)
LRB
ADR0
AAS
(1)
(1)
(2)
NOTES:
1. This bit is read only if it is used for the status check.
To write to this bit, refer to 16.9 START Condition Generation Method and 16.11 STOP Condition Generation
Method.
2. Read only. If necessary, set to 0.
3. To write to these bits, refer to 16.9 START Condition Generation Method and 16.11 STOP Condition
Generation Method.
Figure 16.5 S10 Register
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16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
I 2 C0 Control Register 1
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
S3D0
Bit Symbol
SIM
WIT
Address
02E616
Bit Name
The interrupt enable bit for
STOP condition detection
The interrupt enable bit for
data receive completion
After Reset
00110000 2
Function
RW
2
0: Disable the I C bus interface
interrupt of STOP condition
detection
1: Enable the I2C bus interface
interrupt of STOP condition
detection
0: Disable the I2C bus interface
interrupt of data receive
completion
1: Enable the I2C bus interface
interrupt of data receive
completion
RW
RW
When setting NACK
(ACK bit = 0), write 0
PED
SDA/port function switch
(1)
bit
0: SDA I/O pin
1: Port output pin
RW
PEC
SCL/port function switch
(1)
bit
0: SCL I/O pin
1: Port output pin
RW
SDAM
The logic value monitor
bit of SDA output
0: SDA output logic value = 0
1: SDA output logic value = 1
RO
SCLM
The logic value monitor
bit of SCL output
0: SCL output logic value = 0
1: SCL output logic value = 1
RO
I2C bus system clock
selection bits,
if bits ICK4 to ICK2 in the
S4D0 register is 000 2
b7 b6
0 0 : VIIC =1/2 fIIC
0 1 : VIIC =1/4fIIC
1 0 : VIIC =1/8 fIIC
1 1 : Reserved
ICK0
ICK1
RW
(2)
RW
NOTE:
1. Bits PED and PEC are enabled when the ES0 bit in the S1D0 register is set to 1 (I2C bus interface enabled).
2. When the PCLK0 bit in the PCLKR register is set to 0, fIIC=f2. When the PCLK0 bit in the PCLKR register is set
to 1, fIIC=f1.
Figure 16.6 S3D0 Register
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16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
I 2 C0 Control Register 2
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
S4D0
Bit Symbol
TOE
TOF
TOSEL
ICK2
Address
02E716
Bit Name
RW
Time out detection flag
0: Not detected
1: Detected
RO
Time out detection time
select bit
0: Long time
1: Short time
RW
I2C bus system clock
select bits
b5 b4 b3
RW
0 0 0 VIIC set by ICK1 and ICK0
bits in S3D0 register
0 0 1 VIIC = 1/2.5 fIIC
0 1 0 VIIC = 1/3 fIIC
0 1 1 VIIC = 1/5 fIIC
(1)
1 0 0 VIIC = 1/6 fIIC
Do not set other than the above values
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RW
RW
Reserved bit
Set to 0
RW
STOP condition detection
interrupt request bit
0: No I2C bus interface interrupt
request
1: I2C bus interface interrupt
request
RW
NOTE:
1. When the PCLK0 bit in the PCLKR register is set to 0, fIIC = f2. When the PCLK0 bit is set to 1, fIIC=f1.
Figure 16.7 S4D0 Register
RW
0: Disabled
1: Enabled
ICK4
SCPIN
Function
Time out detection
function enable bit
ICK3
(b6)
After Reset
00 16
16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
I 2 C0 Start/stop Condition Control Register
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
S2D0
Bit Symbol
Address
02E516
Bit Name
After Reset
00011010 2
Function
RW
SSC0
SSC1
SSC2
RW
START/STOP condition
setting bits(1)
Setting for detection condition
of START/STOP condition.
See Table 16.2
RW
RW
SSC3
RW
SSC4
RW
SIP
SCL/SDA interrupt pin
polarity select bit
0: Active in falling edge
1: Active in rising edge
RW
SIS
SCL/SDA interrupt pin
select bit
0: SDA enabled
1: SCL enabled
RW
START/STOP condition
generation select bit
0: Short setup/hold time mode
1: Long setup/hold time mode
RW
STSPSEL
NOTE:
1. Do not set 000002 or odd values.
Figure 16.8 S2D0 Register
Table 16.2 Recommended setting (SSC4-SSC0) start/stop condition at each oscillation frequency
Oscillation
I2C bus system I2C bus system SSC4-SSC0(1)
SCL release
Setup time
Hold time
f1 (MHz)
clock select
clock(MHz)
time (cycle)
(cycle)
(cycle)
(2)
10
1 / 2f1
5
XXX11110
6.2 µs (31)
3.2 µs (16)
3.0 µs (15)
8
1 / 2f1(2)
4
XXX11010
6.75 µs(27)
3.5 µs (14) 3.25 µs(13)
XXX11000
6.25 µs(25)
3.25 µs (13) 3.0 µs (12)
(2)
8
1 / 8f1
1
XXX00100
5.0 µs (5)
3.0 µs (3)
2.0 µs (2)
(2)
4
1 / 2f1
2
XXX01100
6.5 µs (13)
3.5 µs (7)
3.0 µs (6)
XXX01010
5.5 µs (11)
3.0 µs (6)
2.5 µs (5)
2
1 / 2f1(2)
1
XXX00100
5.0 µs (5)
3.0 µs (3)
2.0 µs (2)
NOTES:
1. Do not set odd values or 000002 to START/STOP condition setting bits (SSC4 to SSC0)
2. When the PCLK0 bit in the PCLKR register is set to 1.
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16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
16.1 I2C0 Data Shift Register (S00 register)
The S00 register is an 8-bit data shift register to store a received data and to write a transmit data. When a
transmit data is written to the S00 register, the transmit data is synchronized with a SCL clock and the data
is transferred from bit 7. Then, every one bit of the data is transmitted, the register's content is shifted for
one bit to the left. When the SCL clock and the data is imported into the S00 register from bit 0. Every one
bit of the data is imported, the register's content is shifted for one bit to the left. Figure 16.9 shows the
timing to store the receive data to the S00 register.
The S00 register can be written when the ES0 bit in the S1D0 register is set to 1 (I2C0 bus interface
enabled). If the S00 register is written when the ES0 bit is set to 1 and the MST bit in the S10 register is set
to 1 (master mode), the bit counter is reset and the SCL clock is output. Write to the S00 register when the
START condition is generatedor when an "L" signal is applied to the SCL pin. The S00 register can be read
anytime regardless of the ES0 bit value.
SCL
SDA
tdfil
Internal SCL
tdfil: Noise elimination circuit delay time
1 to 2 VIIC cycle
tdsft: Shift clock delay time
1 VIIC cycle
Internal SDA
tdfil
tdsft
Shift clock
Store data at the rising edge of shift clock
Figure 16.9 The Receive Data Storing Timing of S00 Register
16.2 I2C0 Address Register (S0D0 register)
The S0D0 register consists of bits SAD6 to SAD0, total of 7. At the addressing is formatted, slave
address is detected automatically and the 7-bit received address data is compared with the contents of
bits SAD6 to SAD0.
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16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
16.3 I2C0 Clock Control Register (S20 register)
The S20 register is used to set theACK control, SCL mode and the SCL frequency.
16.3.1 Bits 0 to 4: SCL Frequency Control Bits (CCR0–CCR4)
These bits control the SCL frequency. See Table 16.3 .
16.3.2 Bit 5: SCL Mode Specification Bit (FAST MODE)
The FAST MODE bit selects SCL mode. When the FAST MODE bit is set to 0, standard clock mode
is entered. When it is set to 1, high-speed clock mode is entered.
When using the high-speed clock mode I2C bus standard (400 kbit/s maximum) to connect buses, set
the FAST MODE bit to 1 (select SCL mode as high-speed clock mode) and use the I2C bus system
clock (VIIC) at 4 MHz or more frequency.
16.3.3 Bit 6: ACK Bit (ACKBIT)
The ACKBIT bit sets the SDA status when an ACK clock(1) is generated. When the ACKBIT bit is set
to 0, ACK is returned and te clock applied to SDA becomes "L" when ACK clock is generated. When
it is set to 1, ACK is not returned and the clock clock applied to SDA maintains "H" at ACK clock
generation.
When the ACKBIT bit is set to 0, the address data is received. When the slave address matches with
the address data, SDA becomes "L" automatically (ACK is returned). When the slave address and the
address data are not matched, SDA becomes "H" (ACK is not returned).
NOTE:
1. ACK clock: Clock for acknowledgment
16.3.4 Bit 7: ACK Clock Bit (ACK-CLK)
The ACK-CLK bit set a clock for data transfer acknowledgement. When the ACK-CLK bit is set to 0,
ACK clock is not generated after data is transferred. When it is set to 1, a master generates ACK clock
every one-bit data transfer is completed. The device, which transmits address data and control data,
leave SDA pin open (apply "H" signal to SDA) when ACK clock is generated. The device which
receives data, receives the generated ACKBIT bit.
NOTE:
1.Do not rewrite the S20 register, other than the ACKBIT bit during data transfer. If data is written
to other than the ACKBIT bit during transfer, the I2C bus clock circuit is reset and the data may
not be transferred successfully.
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16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
→
→
→
→
→
Table 16.3 Setting values of S20 register and SCL frequency
Setting value of CCR4 to CCR0
SCL frequency (at VIIC=4MHz, unit : kHz) (1)
CCR4 CCR3 CCR2 CCR1 CCR0
Standard clock mode
High-speed clock mode
0
0
0
0
0
Setting disabled
Setting disabled
0
0
0
0
1
Setting disabled
Setting disabled
0
0
0
1
0
Setting disabled
Setting disabled
0
0
0
1
1
- (2)
333
0
0
1
0
0
- (2)
250
0
0
1
0
1
100
400 (3)
0
0
1
1
0
83.3
166
500 / CCR value (3)
1000 / CCR value (3)
1
1
1
1
1
1
1
1
1
0
1
1
1
0
1
17.2
16.6
16.1
34.5
33.3
32.3
NOTES:
1. The duty of the SCL clock output is 50 %. The duty becomes 35 to 45 % only when high-speed
clock mode is selected and the CCR value = 5 (400 kHz, at VIIC = 4 MHz). “H” duration of the
clock fluctuates from –4 to +2 I2C system clock cycles in standard clock mode, and fluctuates from
–2 to +2 I2C system clock cycles in high-speed clock mode. In the case of negative fluctuation,
the frequency does not increase because the “L” is extended instead of “H” reduction. These are
the values when the SCL clock synchronization by the synchronous function is not performed.
The CCR value is the decimal notation value of the CCR4 to CCR0 bits.
2. Each value of the SCL frequency exceeds the limit at VIIC = 4 MHz or more. When using these
setting values, use VIIC = 4 MHz or less. Refer to Figure 16.6.
3. The data formula of SCL frequency is described below:
VIIC/(8 x CCR value) Standard clock mode
VIIC/(4 x CCR value) High-speed clock mode (CCR value ≠ 5)
VIIC/(2 x CCR value) High-speed clock mode (CCR value = 5)
Do not set 0 to 2 as the CCR value regardless of the VIIC frequency. Set 100 kHz (max.) in
standard clock mode and 400 kHz (max.) in high-speed clock mode to the SCL frequency by
setting the CCR4 to CCR0 bits.
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16. MULTI-MASTER I2C bus INTERFACE
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16.4 I2C0 Control Register 0 (S1D0)
The S1D0 register controls data communication format.
16.4.1 Bits 0 to 2: Bit Counter (BC0–BC2)
Bits BC2 to BC0 decide how many bits are in one byte data transferred next. After the selected numbers of bits are transferred successfully, I2C bus interface interrupt request is gnerated and bits BC2 to
BC0 are reset to 0002. At this time, if the ACK-CLK bit in the S20 register is set to 1 (with ACK clock),
one bit for ACK clock is added to the numbers of bits selected by the BC2 to BC0 bits.
In addition, bits BC2 to BC0 become 0002 even though the START condition is detected and the
address data is transferred in 8 bits.
16.4.2 Bit 3: I2C Interface Enable Bit (ES0)
The ES0 bit enables to use the multi-master I2C bus interface. When the ES0 bit is set to 0, I2C bus
interface is disabled and the SDA and SCL pins are placed in a high-h-impedance state. When the
ES0 bit is set to 1, the interface is enabled.
When the ES0 bit is set to 0, the process is followed.
1)The bits in the S10 register are set as MST = 0, TRX = 0, PIN = 1, BB = 0, AL = 0, AAS = 0,
ADR0 = 0
2)The S00 register cannot be written.
3)The TOF bit in the S4D0 register is set to 0 (time-out detection flag is not detected)
4)The I2C system clock (VIIC) stops counting while the internal counter and flags are reset.
16.4.3 Bit 4: Data Format Select Bit (ALS)
The ALS bit determines whether the salve address is recognized. When the ALS bit is set to 0, an
addressing format is selected and a address data is recognized. Only if the comparison is matched
between the slave address stored into the S0D0 register and the received address data or if the
general call is received, the data is transferred. When the ALS bit is set to 1, the free data format is
selected and the slave address is not recognized.
16.4.4 Bit 6: I2C bus Interface Reset Bit (IHR)
The IHR bit is used to reset the I2C bus interface circuit when the error communication occurs.
When the ES0 bit in the S1D0 register is set to 1 (I2C bus interface is enabled), the hardware is reset
by writing 1 to the IHR bit. Flags are processed as follows:
1)The bits in the S10 register are set as MST = 0, TRX = 0, PIN to 1, BB = 0, AL = 0, AAS =
0, and ADR0 = 0
2)The TOF bit in the S4D0 register is set to 0 (time-out detection flag is not detected)
3)The internal counter and flags are reset.
The I2C bus interface circuit is reset after 2.5 VIIC cycles or less, and the IHR bit becomes 0 automatically by writing 1 to the IHR bit. Figure 16.10 shows the reset timing.
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16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
16.4.5 Bit 7: I2C bus Interface Pin Input Level Select Bit (TISS)
The TISS bit selects the input level of the SCL and SDA pins for the multi-master I2C bus interface.
When the TISS bit is set to 1, the P20 and P21 become the SMBus input level.
Write 1 to IHR bit
IHR bit
A reset signal to I2C bus interface circuit
2.5 VIIC cycles
Figure 16.10 The timing of reset to the I2C bus interface circuit
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16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
16.5 I2C0 Status Register (S10 register)
The S10 register monitors the I2C bus interface status. When using the S10 register to check the status,
use the 6 low-order bits for read only.
16.5.1 Bit 0: Last Receive Bit (LRB)
The LRB bit stores the last bit value of received data. It can also be used to confirm whether ACK is
received. If the ACK-CLK bit in the S20 register is set to 1 (with ACK clock) and ACK is returned when the
ACK clock is generated, the LRB bit is set to 0. If ACK is not returned, the LRB bit is set to 1. When the
ACK-CLK bit is set to 0 (no ACK clock), the last bit value of received data is input. When writing data to
the S00 register, the LRB bit is set to 0.
16.5.2 Bit 1: General Call Detection Flag (ADR0)
When the ALS bit in the S1D0 register is set to 0 (addressing format), this ADR0 flag is set to 1 by
receiving the general calls(1),whose address data are all 0, in slave mode.
The ADR0 flag is set to 0 when STOP or START conditions is detected or when the IHR bit in the S1D0
register is set to 1 (reset).
NOTE:
1. General call: A master device transmits the general call address 0016 to all slaves. When the
master device transmits the general call, all slave devices receive the controlled data after general
call.
16.5.3 Bit 2: Slave Address Comparison Flag (AAS)
The AAS flag indicates a comparison result of the slave address data after enabled by setting the ALS bit
in the S1D0 register to 0 (addressing format).
The AAS flag is set to 1 when the 7 bits of the address data are matched with the slave address stored
into the S0D0 register, or when a general call is received, in slave receive mode. The AAS flag is set to
0 by writing data to the S00 register. When the ES0 bit in the S1D0 register is set to 0 (I2C bus interface
disabled) or when the IHR bit in the S1D0 register is set to 1 (reset), the AAS flag is also set to 0.
16.5.4 Bit 3: Arbitration Lost Detection Flag (AL)(1)
In master transmit mode, if an "L" signal is applied to the SDA pin by other than the MCU, the AL flag is set
to 1 by determining that the arbitration is los and the TRX bit in the S10 register is set to 0 (receive mode)
at the same time. The MST bit in the S10 register is set to 0 (slave mode) after transferring the bytes
which lost the arbitration.
The arbitration lost can be detected only in master transmit mode. When writing data to the S00 register,
the AL flag is set to 0. When the ES0 bit in the S1D0 register is set to 0 (I2C bus interface disabled) or
when the IHR bit in the S1D0 register is set to 1 (reset), the AL flag is set to 0.
NOTE:
1. Arbitration lost: communication disabled as a master
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16. MULTI-MASTER I2C bus INTERFACE
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16.5.5 Bit 4: I2C bus Interface Interrupt Request Bit (PIN)
The PIN bit generates an I2C bus interface interrupt request signal. Every one byte data is ransferred, the
PIN bit is changed from 1 to 0. At the same time, an I2C bus interface interrupt request is generated. The
PIN bit is synchronized with the last clock of the internal transfer clock (when ACK-CLK=1, the last clock
is the ACK clock: when the ACK-CLK=0, the last clock is the 8th clock) and it becomes 0. The interrupt
request is generated on the falling edge of the PIN bit. When the PIN bit is set to 0, the clock applied to
SCL maintains "L" and further clock generation is disabled. When the ACK-CLK bit is set to 1 and the
WIT bit in the S3D0 register is set to 1 (enable the I2C bus interface interrupt of data receive completion).
The PIN bit is synchronized with the last clock and the falling edge of the ACK clock. Then, the PIN bit is
set to 0 and I2C bus interface interrupt request is generated. Figure 16.11 shows the timing of the I2C
bus interface interrupt request generation.
The PIN bit is set to 1 in one of the following conditions:
•When data is written to the S00 register
•When data is written to the S20 register (when the WIT bit is set to 1 and the internal WAIT flag is set
to 1)
•When the ES0 bit in the S1D0 register is set to 0 (I2C bus interface disabled)
•When the IHR bit in the S1D0 register is set to 1(reset)
The PIN bit is set to 0 in one of the following conditions:
•With completion of 1-byte data transmit (including a case when arbitration lost is detected)
•With completion of 1-byte data receive
•When the ALS bit in the S1D0 register is set to 0 (addressing format) and slave address is matched
or general call address is received successfully in slave receive mode
•When the ALS bit is set to 1 (free format) and the address data is received successfully in slave
receive mode
16.5.6 Bit 5: Bus Busy Flag (BB)
The BB flag indicates the operating conditions of the bus system. When the BB flag is set to 0, a bus
system is not in use and a START condition can be generated. The BB flag is set and reset based on an
input signal of the SCL and SDA pins either in master mode or in slave mode. When the START condition
is detected, the BB flag is set to 1. On the other hand, when the STOP condition is detected, the BB flag
is set to 0. Bits SSC4 to SSC0 in the S2D0 register decide to detect between the START condition and
the STOP condition. When the ES0 bit in the S1D0 register is set to 0 (I2C bus interface disabled) or
when the IHR bit in the S1D0 register is set to 1 (reset), the BB flag is set to 0. Refer to 16.9 START
Condition Generation Method and 16.11 STOP Condition Generation Method.
SC L
PIN flag
I2CIRQ
Figure 16.11 Interrupt request signal generation timing
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16. MULTI-MASTER I2C bus INTERFACE
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16.5.7 Bit 6: Communication Mode Select Bit (Transfer Direction Select Bit: TRX)
This TRX bit decides a transfer direction for data communication. When the TRX bit is set to 0, receive
mode is entered and data is received from a transmit device. When the TRX bit is set to 1, transmit mode
is entered, and address data and control data are output to the SDAMM, synchronized with a clock generated in the SCLMM.
The TRX bit is set to 1 automatically in the following condition:
•In slave mode, when the ALS in the S1D0 register to 0(addressing format), the AAS flag is set to
___
1 (address match) after the address data is received, and the received R/W bit is set to 1
The TRX bit is set to 0 in one of the following conditions:
•When an arbitration lost is detected
•When a STOP condition is detected
•When a START condition is detected
•When a START condition is disabled by the START condition duplicate protect function (1)
•When the MST bit in the S10 register is set to 0(slave mode) and a start condition is detected
•When the MST bit is set to 0 and the ACK non-return is detected
•When the ES0 bit is set to 0(I2C bus interface disabled)
•When the IHR bit in the S1D0 register is set to 1(reset)
16.5.8 Bit 7: Communication mode select bit (master/slave select bit: MST)
The MST bit selects either master mode or slave mode for data communication. When the MST bit is set
to 0, slave mode is entered and the START/STOP condition generated by a master device are received.
The data communication is synchronized with the clock generted by the master. When the MST bit is set
to 1, master mode is entered and the START/STOP condition is generated.
Additionally, clocks required for the data communication are generated on the SCLMM.
The MST bit is set to 0 in one of the following conditions.
•After 1-byte data of a master whose arbtration is lost if arbitration lost is detected
•When a STOP condition is detected
•When a START condition is detected
•When a start condition is disabled by the START condition duplicate protect function (1)
•When the IHR bit in the S1D0 register is set to 1(reset)
•When the ES0 bit is set to 0(I2C bus interface disabled)
NOTE:
1. START condition duplicate protect function:
When the START condition is generated, after confirming that the BB flag in the S1D0 register is
set to 0 (bus free), all the MST, TRX and BB flags are set to 1 at the same time. However, if the
BB flag is set to 1 immediately after the BB flag setting is confirmed because a START condition
is generated by other master device, bits MST and TRX cannot be written. The duplicate protect
function is valid from the rising edge of the BB flag until slave address is received. Refer to 16.9
START Condition Generation Method for details.
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16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
16.6 I2C0 Control Register 1 (S3D0 register)
The S3D0 register controls the I2C bus interface circuit.
16.6.1 Bit 0 : Interrupt Enable Bit by STOP Condition (SIM )
The SIM bit enables the I2C bus interface interrupt request by detecting a STOP condition. If the SIM bit
is set to 1, the I2C bus interface interrupt request is generated by the STOP condition detect (no need to
change in the PIN flag).
16.6.2 Bit 1: Interrupt Enable Bit at the Completion of Data Receive (WIT)
If the WIT bit is set to 1 while the ACK-CLK bit in the S20 register is set to 1 (ACK clock), the I2C bus
interface interrupt request is generated and the PIN bit is set to 1 at the falling edge of the last data bit
clock. Then an "L" signal is applied to the SCLMM and the ACK clock generation is controlled. Table 16.4
and Figure 16.12 show the interrupt generation timing and the procedure of communication restart. After
the communication is restarted, the PIN bit is set to 0 again, synchronized with the falling edge of the ACK
clock, and the I2C bus interface interrupt request is generated.
Table16.4 Timing of Interrupt Generation in Data Receive Mode
I2C bus Interface Interrupt Generation Timing
Procedure of Communication Restart
1) Synchronized with the falling edge of the
Set the ACK bit in the S20 register.
last data bit clock
Set the PIN bit to 1.
(Do not write to the S00 register. The ACK clock
operation may be unstable.)
2) Synchronized with the falling edge of the
Set the S00 register
ACK clock
The internal WAIT flag can be read by reading the WIT bit. The internal WAIT flag is set to 1 after writing
data to the S00 register and it is set to 0 after writing to the S20 register.
Consequently, the I2C bus interface interrupt request generated by the timing 1) or 2) can be determined.
(See Figure 16.12)
When the data is transmitted and the address data is received immediately after the START condition,
the WAIT flag remains 0 regardless of the WIT bit setting, and the I2C bus interface interrupt request is
only generated at the falling edge of the ACK clock. Set the WIT bit to 0 when the ACK-CLK bit in the S20
register is set to 0 (no ACK clock).
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16. MULTI-MASTER I2C bus INTERFACE
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In receive mode, ACK bit = 1 WIT bit = 0
7 clock
SCL
SDA
ACK
clock
8 clock
7 bit
8 bit
1 clock
ACK bit
1 bit
ACKBIT bit
PIN flag
Internal WAIT flag
I2C bus interface
interrupt request signal
The writing signal of
the S00 register
In receive mode, ACK bit = 1 WIT bit = 1
7 clock
SCL
SDA
ACK
clock
8 clock
7 bit
1 bit
8 bit
ACKBIT bit
PIN flag
Internal WAIT flag
1)
I2C bus interface
interrupt request signal
2)
The writing signal of
the S00 register
The writing signal of the S2
0 register
NOTE:
1. Do not write to the I2C0 clock control register except the bit ACK-BIT.
Figure 16.12 The timing of the interrupt generation at the completion of the data receive
16.6.3 Bits 2,3 : Port Function Select Bits PED, PEC
If the ES0 bit in the S1D0 register is set to 1 (I2C bus interface enabled), the SDAMM functions as an
output port. When the PED bit is set to 1 and the SCLMM functions as an output port when the PEC bit is
set to 1. Then the setting values of bits P2_0 and P2_1 in the port P2 register are output to the I2C bus,
regardless of he internal SCL/SDA output signals. (SCL/SDA pins are onnected to I2C bus interface
circuit)
The bus data can be read by reading the port pi direction register in input mode, regardless of the setting
values of the PED and PEC bits. Table 16.5 shows the port specification.
Table 16.5 Port specifications
Pin Name
P20
Pin Name
P21
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ES9 Bit
PED Bit
P20 Port Direction
Register
0
-
0/1
Port I/O function
1
0
-
SDA I/O function
1
1
-
SDA input function, port output function
ES0 Bit
PEC Bit
P21 Port Direction
Register
0
-
0/1
Port I/O function
1
0
-
SCL I/O function
1
1
-
SCL input function, port output funcion
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Function
Function
16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
16.6.4 Bits 4,5 : SDA/SCL Logic Output Value Monitor Bits SDAM/SCLM
Bits SDAM/SCLM can monitor the logic value of the SDA and SCL output signals from the I 2C bus
interface circuit. The SDAM bit monitors the SDA output logic value. The SCLM bit monitors the SCL
output logic value. The SDAM and SCLM bits are read-only. If necessary, set them to 0.
16.6.5 Bits 6,7 : I2C System Clock Select Bits ICK0, ICK1
The ICK1 bit, ICK0 bit, bits ICK4 to ICK2 in the S4D0 register, and the PCLK0 bit in the PCLKR register
can select the system clock (VIIC) of the I2C bus interface circuit.
The I2C bus system clock VIIC can be selected among 1/2 fIIC, 1/2.5 fIIC, 1/3 fIIC, 1/4 fIIC, 1/5 fIIC, 1/6 fIIC
and 1/8 fIIC. fIIC can be selected between f1 and f2 by the PCLK0 bit setting.
Table 16.6 I2C system clock select bits
I3CK4[S4D0]
0
0
0
0
0
0
1
ICK3[S4D0]
0
0
0
0
1
1
0
ICK2[S4D0]
0
0
0
1
0
1
0
ICK1[S3D0]
0
0
1
X
X
X
X
ICK0[S3D0]
0
1
0
X
X
X
X
I2C system clock
VIIC = 1/2 fIIC
VIIC = 1/4 fIIC
VIIC = 1/8 fIIC
VIIC = 1/2.5 fIIC
VIIC = 1/3 fIIC
VIIC = 1/5 fIIC
VIIC = 1/6 fIIC
( Do not set the combination other than the above)
16.6.6 Address Receive in STOP/WAIT Mode
When WAIT mode is entered after the CM02 bit in the CM0 register is set to 0 (do not stop the peripheral
function clock in wait mode), the I2C bus interface circuit can receive address data in WAIT mode. However, the I2C bus interface circuit is not operated in STOP mode or in low power consumption mode,
because the I2C bus system clock VIIC is not supplied.
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16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
16.7 I2C0 Control Register 2 (S4D0 Register)
The S4D0 register controls the error communication detection.
If the SCL clock is stopped counting dring data transfer, each device is stopped, staying online. To avoid
the situation, the I2C bus interface circuit has a function to detect the time-out when the SCL clock is
stopped in high-level ("H") state for a specific period, and to generate an I2C bus interface interrupt request.
See Figure 16.13.
SCL clock stop (“H”)
1 clock
SCL
SDA
1 bit
2 clock
2 bit
3 clock
3 bit
BB flag
Internal counter start signal
Internal counter stop, reset signal
Internal counter overflow signal
I2C-bus interface interrupt
request signal
Figure 16.13 The timing of time-out detection
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The time of timeout detection
16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
16.7.1 Bit0: Time-Out Detection Function Enable Bit (TOE)
The TOE bit enables the time-out detection function. When the TOE bit is set to 1, time-out is detected
and the I2C bus interface interrupt request is generated when the following conditions are met.
1) the BB flag in the S10 register is set to 1 (bus busy)
2) the SCL clock stops for time-out detection period while high-level ("H") signal is maintained (see
Table 16.7)
The internal counter measures the time-out detection time and the TOSEL bit selects between two
modes, long time and short time. When time-out is detected, set the ES0 bit to 0 (I2C bus interface
disabled) and reset the counter.
16.7.2 Bit1: Time-Out Detection Flag (TOF )
The TOF flag indicates the time-out detection. If the internal counter which measures the time-out
period overflows, the TOF flag is set to 1 and the I2C bus interface interrupt request is generated at the
same time.
16.7.3 Bit2: Time-Out Detection Period Select Bit (TOSEL)
The TOSEL bit selects time-out detection period from long time mode and short time mode. When the
TOSEL bit is set to 0, long time mode is selected. When it is set to 1, short time mode is selected,
respectively. The internal counter increments as a 16-bit counter in long time mode, while the counter
increments as a 14-bit counter in short time mode, based on the I2C system clock (VIIC) as a counter
source. Table 16.7 shows examples of time-out detection period.
Table 16.7 Examples of Time-out Detection Period
VIIC(MHz)
4
2
1
Long time mode
16.4
32.8
65.6
(Unit: ms)
Short time mode
4.1
8.2
16.4
16.7.4 Bits 3,4,5: I2C System Clock Select Bits (ICK2-4)
Bits ICK4 to ICK2, and bits ICK1 and ICK0 in the S3D0 register, and the PCLK0 bit in the PCLKR register
select the system clock (VIIC) of the I2C bus interface circuit. See Table 16.6 for the setting values.
16.7.5 Bit7: STOP Condition Detection Interrupt Request Bit (SCPIN)
The SCPIN bit monitors the stop condition detection interrupt. The SCPIN bit is set to 1 when the I2C bus
interface interrupt is generated by detecting the STOP condition. When this bit is set to 0 by program, it
becomes 0. However, no change occurs even if it is set to 1.
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16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
16.8 I2C0 START/STOP Condition Control Register (S2D0 Register)
The S2D0 register controls the START/STOP condition detections.
16.8.1 Bit0-Bit4: START/STOP Condition Setting Bits (SSC0-SSC4)
The SCL release time and the set-up and hold times are mesured on the base of the I2C bus system clock
(VIIC). Therefore, the detection conditions changes, depending on the oscillation frequency (XIN) and the
I2C bus system clock select bits. It is necessary to set bits SSC4 to SSC0 to the appropriate value to set
the SCL release time, the set-up and hold times by the system clock frequency (See Table 16.10). Do
not set odd numbers or 000002 to bits SSC4 to SSC0. Table 16.2 shows the reference value to bits
SSC4 to SSC0 at each oscillation frequency in standard clock mode. The detection of START/STOP
conditions starts immediately after the ES0 bit in the S1D0 register is set to 1 (I2C bus interface enabled).
16.8.2 Bit5: SCL/SDA Interrupt Pin Polarity Select Bit (SIP)
The The SIP bit detect the rising edge or the falling edge of the SCLMM or SDAMM to generate SCL/SDA
interrupts. The SIP bit selects the polarity of the SCLMM or the SDAMM for interrupt.
16.8.3 Bit6 : SCL/SDA Interrupt Pin Select Bit (SIS)
The SIS bit selects a pin to enable SCL/SDA interrupt.
NOTE:
1. The SCL/SDA interrupt request may be set when changing the SIP, SIS and ES0 bit settings in the
S1D0 register. When using the SCL/SDA interrupt, set the above bits, while the SCL/SDA interrupt
is disabled. Then, enable the SCL/SDA interrupt after setting the SCL/SDA bit in the IR register to 0.
16.8.4 Bit7: START/STOP Condition Generation Select Bit (STSPSEL)
The STSPSEL bit selects the set-up/hold times, based on the I2C system clock cycles, when the START/
STOP condition is generated (See Table 16.8). Set the STSPSEL bit to 1 if the I2C bus system clock
frequency is over 4MHz.
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16. MULTI-MASTER I2C bus INTERFACE
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16.9 START Condition Generation Method
Set the MST bit, TRX bit and BB flags in the S10 register to 1 and set the PIN bit and 4 low-order bits in the
S10 register to 0 simultaneously, to enter START condition standby mode, when the ES0 bit in the S1D0
register is set to 1 (I2C bus interface enabled) and the BB flag is set to 0 (bus free). When the slave address
is written to the S00 register next, START condition is generated and the bit counter is reset to 0002 and 1byte SCL signal is output. The START condition generation timing varies between standard clock mode
and high-speed clock mode. See Figure 16.16 and Table 16.8.
Interrupt disable
BB=0?
No
Yes
S10 = E016
Start condition standby status setting
S00 = Data
Start condition trigger generation
*Data = Slave address data
Interrupt enable
Figure 16.14 Start condition generation flow chart
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16. MULTI-MASTER I2C bus INTERFACE
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16.10 START Condition Duplicate Protect Function
A START condition is generated when verifying that the BB flag in the S10 register does not use buses.
However, if the BB flag is set to 1 (bus busy) by the START condition which other master device generates
immediately after the BB flag is verified, the START condition is suspended by the START condition duplicate protect function. When the START condition duplicate protect function starts, it operates as follows:
•Disable the start condition standby setting
If the function has already been set, first exit START condition standby mode and then set bits MST and
TRX in the S10 register to 0.
•Writing to the S00 register is disabled. (The START condition trigger generation is disabled)
•If the START condition generation is interrupted, the AL flag in the S10 register becomes 1.(arbitration
lost detection)
The START condition duplicate protect function is valid between the SDA falling edge of the START condition and the receive completion of the slave address. Figure16.15 shows the duration of the START
condition duplicate protect function.
1 clock
SCL
SDA
1 bit
2 clock
2 bit
3 clock
3 bit
8 clock
8 bit
ACK clock
ACK bit
BB flag
The duration of start condition duplicate protect
Figure 16.15 The duration of the start condition duplicate protect function
16.11 STOP Condition Generation Method
When the ES0 bit in the S1D0 register is set to 1 (I2C bus interface enabled) and bits MST and TRX in the
S10 register are set to 1 at the same time, set the BB flag, PIN bit and 4 low-order bits in the S10 register to
0 simultaneously, to enter STOP condition standby mode. When dummy data is written to the S00 register
next, the STOP condition is generated. The STOP condition generation timing varies between standard
clock mode and high-speed clock mode. See Figure 16.17 and Table 16.8.
Until the BB flag in the S10 register becomes 0 (bus free) after an instruction to generate the STOP condition is executed, do not write data to registers S10 and S00. Otherwise, the STOP condition waveform may
not be generated correctly.
If an input signal level of the SCL pin is set to low ("L") after the instruction to generate the STOP condition
is executed, a signal level of the SCL pin becomes high ("H"), and the BB flag is set to 0 (bus free), the MCU
outputs an "L" signal to SCL pin.
In that case, the MCU can stop an "L" signal output to the SCL pin by generating the STOP condition, writing
0 to the ES0 bit in the S1D0 register (disabled), or writing 1 to the IHR bit in the S1D0 register (reset
release).
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16. MULTI-MASTER I2C bus INTERFACE
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S00 register
SCL
Setup
time
Hold
time
SDA
Figure 16.16 Start condition generation timing diagram
S00 register
SCL
Hold
time
Setup
time
SDA
Figure 16.17 Stop condition generation timing diagram
Table 16.8 Start/Stop generation timing table
Start/Stop Condition
Generation Select Bit
Standard Clock Mode
High-speed Clock Mode
0
5.0 µs (20 cycles)
2.5 µs (10 cycles)
1
13.0 µs (52 cycles)
6.5 µs (26 cycles)
0
5.0 µs (20 cycles)
2.5 µs (10 cycles)
1
13.0 µs (52 cycles)
6.5 µs (26 cycles)
Setup time
Hold time
N OTE:
1. Actual time at the time of VIIC = 4MHz, The contents in () denote cycle numbers.
As mentioned above, when bits MST and TRX are set to 1, START condition or STOP condition mode is
entered by writing 1 or 0 to the BB flag in the S10 register and writing 0 to the PIN bit and 4 low-order bits in
the S10 register at the same time. Then SDAMM is left open in the START condition standby mode and
SDAMM is set to low-level ("L") in the STOP condition standby mode. When the S00 register is set, the
START/STOP conditions are generated. In order to set bits MST and TRX to 1 without generating the
START/STOP conditions, write 1 to the 4 low-order bits simultaneously. Table 16.9 lists functions along
with the S10 register settings.
Table 16.9 S10 Register Settings and Functions
S10 Register Settings
Function
MST
TR X
BB
PIN
AL
AAS
AS0
LRB
1
1
1
0
0
0
0
0
Setting up the START condition stand by in master
transmit mode
1
1
0
0
0
0
0
0
Setting up the STOP condition stand by in master
transmit mode
0/1
0/1
-
0
1
1
1
1
Setting up each communication mode (refer to 16.5
I2C status register)
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16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
16.12 START/STOP Condition Detect Operation
Figure 16.18, Figure 16.19 and Table 16.10 show START/STOP condition detect operations. Bits SSC4
to SSC0 in the S2D0 register set the START/STOP conditions. The START/STOP condition can be detected only when the input signal of the SCLMM and SDAMM met the following conditions: the SCL release
time, the set-up time, and the hold time (see Table 16.10). The BB flag in the S10 register is set to 1 when
the START condition is detected and it is set to 0 when the STOP condition is detected. The BB flag set and
reset timing varies between standard clock mode and high-speed clock mode. See Table 16.10.
SCL release time
SCL
Setup time
Hold time
SDA
BB flag
set time
BB flag
Figure 16.18 Start condition detection timing diagram
SCL release time
SCL
Setup time
Hold time
SDA
BB flag
set time
BB flag
Figure 16.19 Stop condition detection timing diagram
Table 16.10 Start/Stop detection timing table
SCL release time
Setup time
Hold time
BB flag set/reset
time
Standard clock mode
SSC value + 1 cycle (6.25µs)
SSC value + 1 cycle < 4.0µs (3.25µs)
2
SSC value cycle < 4.0µs (3.0µs)
2
SSC value - 1 +2 cycles (3.375µs)
2
High-speed clock mode
4 cycles (1.0µs)
2 cycles (0.5µs)
2 cycles (0.5µs)
3.5 cycles (0.875µs)
NOTE:
1. Unit : number of cycle for I2C system clock VIIC
The SSC value is the decimal notation value of bits SSC4 to SSC0. Do not set 0 or odd numbers to the SSC
setting. The values in ( ) are examples when the S2D0 register is set to 1816 at VIIC = 4 MHz.
Rev. 1.12 Mar.30, 2007
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16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
16.13 Address Data Communication
This section describes data transmit control when a master transferes data or a slave receives data in 7-bit
address format. Figure 16.20 (1) shows a master transmit format.
(1) A master transmit device transmits data to a receive device
S
Slave address
R/W
7 bits
0
A
Data
A
1 - 8 bits
Data
A/A
P
A
P
1 - 8 bits
(2) A master receive device receives data from a transmit device
S
Slave address
R/W
7 bits
1
S: START condition
A: ACK bit
A
Data
1 - 8 bits
A
Data
1 - 8 bits
P: STOP condition
R/W: Read/Write bit
Figure 16.20 Address data communication format
16.13.1 Example of Master Transmit
For example, a master transmits data as shown below when following conditions are met: standard clock
mode, SCL clock frequency of 100kHz and ACK clock added.
1) Set s slave address to the 7 high-order bits in the S0D0 register
2) Set 8516 to the S20 register, 0002 to bits ICK4 to ICK2 in the S4D0 register and 0016 to the S3D0
registe to generate an ACK clock and set SCL clock frequency t 100 kHz (f1=8MHz, fIIC=f1)
3) Set 0016 to the S10 register to reset transmit/receive
4) Set 0816 to the S1D0 register to enable data communication
5) Confirm whether the bus is free by BB flag setting in the S10 register
6) Set E016 to the S10 register to enter START condition standby mode
7) Set the destination address in 7 high-order bits and 0 to a least significant bit in the S00 register to
generate START condition. At this time, the first byte consisting of SCL and ACK clock are automatically generated
8) Set a transmit data to the S00 register. At this time, SCL and an ACK clock are automatically
generated
9) When transmitting more than 1-byte control data, repeat the above step 8).
10) Set C016 in the S10 register to enter STOP condition standby mode if ACK is not returned from the
slave receiver or if the transmit is completed
11) Write dummy data to the S00 regiser to generate STOP condition
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16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
16.13.2 Example of Slave Receive
For example, a slave receives data as shown below when following conditions are met: high-speed clock
mode, SCL frequency of 400 kHz, ACK clock added and addressing format.
1) Set a slave address in the 7 high-order bits in the S0D0 register
2) Set A516 to the S20 register, 0002 to bits ICK4 to ICK2 in the S4D0 register, and 0016 to the S3D0
register to generate an ACK clock and set SCL clock frequency at 400kHz (f1 = 8 MHz, fIIC = f1)
3) Set 0016 to the S10 register to reset transmit/receive mode
4) Set 0816 to the S1D0 register to enable data communication
5) When a START condition is received, addresses are compared
6) •When the transmitted addresses are all 0 (general call), the ADR0 bit in the S10 register is set to 1
and an I2C bus interface interrupt request signal is generated.
•When the transmitted addresses match with the address set in 1), the ASS bit in the S10 register
is set to 1 and an I2C bus interface interrupt request signal is generated.
•In other cases, bits ADR0 and AAS are set to 0 and I2C bus interface interrupt request signal is not
generated.
7) Write dummy data to the S00 register.
8) After receiving 1-byte data, an ACK-CLK bit is automatically returned and an I2C bus interface
interrupt request signal is generated.
9) To determine whether the ACK should be returned depending on contents in the received data, set
dummy data to the S00 register to receive data after setting the WIT bit in te S3D0 register to 1
(enable the I2C bus interface interrupt of data receive completion). Because the I2C bus interface
interrupt is generated when the 1-byte data is received, set the ACKBIT bit to 1 or 0 to output a
signal from the ACKBIT bit.
10) When receiving more than 1-byte control data, repeat steps 7) and 8) or 7) and 9).
11) When a STOP condition is detected, the communication is ended.
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16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
16.14 Precautions
(1) Access to the registers of I2C bus interface circuit
The following is precautions when read or write the control registers of I2C bus interface circuit
•S00 register
Do not rewrite the S00 register during data transfer. If the bits in the S00 register are rewritten, the bit
counter for transfer is reset and data may not be transferred successfully.
•S1D0 register
Bits BC2 o BC0 are set to 0002 when START condition is detected or when 1-byte data transfer is
completed. Do not read or write the S1D0 register at this timing. Otherwise, data may be read or
written unsuccessfully. Figure 16.22 and Figure 16.23 show the bit counter reset timing.
•S20 register
Do not rewrite the S20 register except the ACKBIT bit during transfer. If the bits in the S20 register
except ACKBIT bit are rewritten, the I2C bus clock circuit is reset and data may be transferred incompletely.
•S3D0 register
Rewrite bits ICK4 to ICK0 in the S3D0 register when the ES0 bit in the S1D0 register is set to 0 (I2C bus
interface is disabled). When the WIT bit is read, the internal WAIT flag is read. Therefore, do not use
the bit managing instruction(read-modify-write instruction) to access the S3D0 register.
•S10 register
Do not use the bit managing instruction (read-modify-write instruction) because all bits in the S10
register will be changed, depending on the communication conditions. Do not read/write when te
communication mode select bits, bits MST and TRX, are changing their value. Otherwise, data may be
read or written unsuccessfully. Figure16.21 to Figure 16.23 show the timing when bits MST and TRX
change.
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16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
SCL
SDA
BB flag
Bit reset signal
Related bits
1.5 VIIC cycle
MST
TRX
Figure 16.21 The bit reset timing (The STOP condition detection)
SCL
SDA
BB flag
Bit reset signal
Related bits
BC2 - BC0
TRX (in slave mode)
Figure 16.22 The bit reset timing (The START condition detection)
SCL
PIN bit
AA
AAA
Bit reset signal
2VIIC cycle
Bit set signal
1VIIC cycle
AAAAA
AAAAA
AAAAA
The bits referring
to reset
The bits referring
to set
Figure 16.23 Bit set/reset timing ( at the completion of data transfer)
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BC0 - BC2
MST(When in arbitration lost)
TRX(When in NACK receive in slave
transmit mode)
TRX(ALS=0 meanwhile the slave
receive R/W bit = 1
16. MULTI-MASTER I2C bus INTERFACE
M16C/29 Group
(2) Generation of RESTART condition
In order to generate a RESTART condition after 1-byte data transfer, write E016 to the S10 register,
enter START condition standby mode and leave the SDAMM open. Generate a START condition trigger
by setting the S00 register after inserting a sufficient software wait until the SDAMM outputs a high-level
("H") signal. Figure 16.24 shows the RESTART condition generation timing.
SCL
8 clocks
ACK clock
SDA
S10 writing signal
(START condition setting standby)
Insert software wait
S00 writing signal
(START condition triger generation)
Figure 16.24 The time of generation of RESTART condition
(3) Iimitation of CPU clock
When the CM07 bit in the CM0 register is set to 1 (subclock), each register of the I2C bus interface
circuit cannot be read or written. Read or write data when the CM07 bit is set to 0 (main clock, PLL
clock, or on-chip oscillator clock).
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17. CAN Module
M16C/29 Group
17. CAN Module
The CAN (Controller Area Network) module for the M16C/29 Group of MCUs is a communication controller
implementing the CAN 2.0B protocol. The M16C/29 Group contains one CAN module which can transmit
and receive messages in both standard (11-bit) ID and extended (29-bit) ID formats.
Figure 17.1 shows a block diagram of the CAN module.
External CAN bus driver and receiver are required.
Data Bus
C0CONR Register
C0CTLR Register
C0GMR Register
C0IDR Register
C0LMAR Register
C0MCTLj Register
C0LMBR Register
CTX
Message Box
slots 0 to 15
Protocol
Controller
Acceptance Filter
slots 0 to 15
16 Bit Timer
CRX
C0TSR Register
Message ID
DLC
Message Data
Time Stamp
Wake Up
Function
Interrupt
Generation
Function
C0RECR Register
C0TECR Register
C0STR Register
C0SSTR Register
C0ICR Register
CAN0 Successful Reception Int
CAN0 Successful Transmission Int
CAN0 Error Int
Data Bus
CAN0 Wake-Up Int
j = 0 to 15
Figure 17.1 Block Diagram of CAN Module
CTx/CRx:
Protocol controller:
CAN I/O pins.
This controller handles the bus arbitration and the CAN protocol services, i.e. bit
timing, stuffing, error status etc.
Message box:
This memory block consists of 16 slots that can be configured either as transmitter
or receiver. Each slot contains an individual ID, data length code, a data field
(8 bytes) and a time stamp.
Acceptance filter:
This block performs filtering operation for received messages. For the filtering
operation, the C0GMR register, the C0LMAR register, or the C0LMBR register is
used.
16 bit timer:
Used for the time stamp function. When the received message is stored in the
message memory, the timer value is stored as a time stamp.
Wake-up function:
CAN0 wake-up interrupt request is generated by a message from the CAN bus.
Interrupt generation function: The interrupt requests are generated by the CAN module. CAN0 successful
reception interrupt, CAN0 successful transmission interrupt, CAN0 error interrupt
and CAN0 wake-up interrupt.
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17. CAN Module
M16C/29 Group
17.1 CAN Module-Related Registers
The CAN0 module has the following registers.
(1) CAN Message Box
A CAN module is equipped with 16 slots (16 bytes or 8 words each). Slots 14 and 15 can be used as Basic
CAN.
• Priority of the slots: The smaller the number of the slot, the higher the priority, in both transmission and
reception.
• A program can define whether a slot is defined as transmitter or receiver.
(2) Acceptance Mask Registers
A CAN module is equipped with 3 masks for the acceptance filter.
• CAN0 global mask register (C0GMR register: 6 bytes)
Configuration of the masking condition for acceptance filtering processing to slots 0 to 13
• CAN0 local mask A register (C0LMAR register: 6 bytes)
Configuration of the masking condition for acceptance filtering processing to slot 14
• CAN0 local mask B register (C0LMBR register: 6 bytes)
Configuration of the masking condition for acceptance filtering processing to slot 15
(3) CAN SFR Registers
• CAN0 message control register j (C0MCTLj register: 8 bits ✕ 16) (j = 0 to 15)
Control of transmission and reception of a corresponding slot
• CANi control register (CiCTLR register: 16 bits) (i = 0, 1)
Control of the CAN protocol
• CAN0 status register (C0STR register: 16 bits)
Indication of the protocol status
• CAN0 slot status register (C0SSTR register: 16 bits)
Indication of the status of contents of each slot
• CAN0 interrupt control register (C0ICR register: 16 bits)
Selection of “interrupt enabled or disabled” for each slot
• CAN0 extended ID register (C0IDR register: 16 bits)
Selection of ID format (standard or extended) for each slot
• CAN0 configuration register (C0CONR register: 16 bits)
Configuration of the bus timing
• CAN0 receive error count register (C0RECR register: 8 bits)
Indication of the error status of the CAN module in reception: the counter value is incremented or
decremented according to the error occurrence.
• CAN0 transmit error count register (C0TECR register: 8 bits)
Indication of the error status of the CAN module in transmission: the counter value is incremented or
decremented according to the error occurrence.
• CAN0 time stamp register (C0TSR register: 16 bits)
Indication of the value of the time stamp counter
• CAN0 acceptance filter support register (C0AFS register: 16 bits)
Decoding the received ID for use by the acceptance filter support unit
Explanation of each register is given as follows.
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17. CAN Module
M16C/29 Group
17.1.1 CAN0 Message Box
Table 17.1 shows the memory mapping of the CAN0 message box.
It is possible to access to the message box in byte or word.
Mapping of the message contents differs from byte access to word access. Byte access or word access
can be selected by the MsgOrder bit of the C0CTLR register.
Table 17.1 Memory Mapping of CAN0 Message Box
Message content (Memory mapping)
Address
006016
006016
006016
006016
006016
006016
006016
006016
+
+
+
+
+
+
+
+
n
n
n
n
n
n
n
n
•
•
•
•
•
•
•
•
•
•
•
16
16
16
16
16
16
16
16
+
+
+
+
+
+
+
+
0
1
2
3
4
5
6
7
006016 + n • 16 + 13
006016 + n • 16 + 14
006016 + n • 16 + 15
n = 0 to 15: the number of the slot
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Byte access (8 bits)
SID10 to SID 6
SID5 to SID0
EID17 to EID14
EID13 to EID 6
EID5 to EID0
Data Length Code (DLC)
Data byte 0
Data byte 1
•
•
•
Word access (16 bits)
SID5 to SID0
SID10 to SID6
EID13 to EID6
EID17 to EID 14
Data Length Code (DLC)
EID5 to EID0
Data byte 1
Data byte 0
•
•
•
Data byte 7
Data byte 6
Time stamp high-order byte Time stamp low-order byte
Time stamp low-order byte Time stamp high-order byte
17. CAN Module
M16C/29 Group
Figures 17.2 and 17.3 show the bit mapping in each slot in byte access and word access. The content of
each slot remains unchanged unless transmission or reception of a new message is performed.
bit 7
bit 0
SID5
EID13
EID12
SID10
SID9
SID8
SID7
SID6
SID4
SID3
SID2
SID1
SID0
EID17
EID16
EID15
EID14
EID11
EID10
EID9
EID8
EID7
EID6
EID5
EID4
EID3
EID2
EID1
EID0
DLC3
DLC2
DLC1
DLC0
Data Byte 0
Data Byte 1
Data Byte 7
Time Stamp high-order byte
Time Stamp low-order byte
CAN Data Frame:
SID10 to 6
SID5 to 0
EID17 to 14
EID13 to 6
EID5 to 0
Data Byte 0
DLC3 to 0
Data Byte 1
Data Byte 7
NOTE:
is read, the value is the one written upon the transmission slot configuration.
1. When
The value is 0 when read on the reception slot configuration.
Figure 17.2 Bit Mapping in Byte Access
bit 15
bit 8
bit 7
bit 0
SID10 SID9 SID8 SID7 SID6
SID5 SID4 SID3 SID2 SID1 SID0
EID17 EID16 EID15 EID14 EID13 EID12 EID11 EID10 EID9 EID8 EID7 EID6
EID5 EID4 EID3 EID2 EID1 EID0
DLC3 DLC 2 DLC1 DLC0
Data Byte 0
Data Byte 1
Data Byte 2
Data Byte 3
Data Byte 4
Data Byte 5
Data Byte 6
Data Byte 7
Time Stamp high-order byte
Time Stamp low-order byte
CAN Data Frame:
SID10 to 6
SID5 to 0
NOTE:
1. When
EID17 to 14
EID13 to 6
EID5 to 0
DLC3 to 0
Data Byte 0
is read, the value is the one written upon the transmission slot configuration.
The value is "0" when read on the reception slot configuration.
Figure 17.3 Bit Mapping in Word Access
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Data Byte 1
page 290 of 458
Data Byte 7
17. CAN Module
M16C/29 Group
17.1.2 Acceptance Mask Registers
Figures 17.4 and 17.5 show the C0GMR register, the C0LMAR register, and the C0LMBR register, in
which bit mapping in byte access and word access are shown.
bit 7
SID5
EID13
EID12
EID12
EID12
SID10
SID9
SID8
SID7
SID6
016016
SID4
SID3
SID2
SID1
SID0
016116
EID17
EID16
EID15
EID14
016216
EID10
EID9
EID8
EID7
EID6
016316
EID5
EID4
EID3
EID2
EID1
EID0
016416
SID10
SID9
SID8
SID7
SID6
016616
SID4
SID3
SID2
SID1
SID0
016716
EID17
EID16
EID15
EID14
016816
EID11
EID10
EID9
EID8
EID7
EID6
016916
EID5
EID4
EID3
EID2
EID1
EID0
016A16
SID10
SID9
SID8
SID7
SID6
016C16
SID4
SID3
SID2
SID1
SID0
016D16
EID17
EID16
EID15
EID14
016E16
SID5
EID13
Addresses
CAN0
EID11
SID5
EID13
bit 0
EID11
EID10
EID9
EID8
EID7
EID6
016F16
EID5
EID4
EID3
EID2
EID1
EID0
017016
C0GMR register
C0LMAR register
C0LMBR register
NOTES
1.
is undefined.
2. These registers can be written in CAN reset/initialization mode of the CAN module.
Figure 17.4 Bit Mapping of Mask Registers in Byte Access
bit 15
bit 8
SID10 SID9 SID8 SID7 SID6
Addresses
CAN0
bit 7
bit 0
SID5 SID4 SID3 SID 2 SID1 SID 0
016016
EID17 EID16 EID15 EID14 EID13 EID12 EID11 EID10 EID9 EID8 EID7 EID6
016216
EID5 EID4 EID3 EID2 EID1 EID0
SID10 SID9 SID8 SID7 SID6
016416
SID5 SID4 SID3 SID 2 SID1 SID 0
016616
EID17 EID16 EID15 EID14 EID13 EID12 EID11 EID10 EID9 EID8 EID7 EID6
016816
EID5 EID4 EID3 EID2 EID1 EID0
SID10 SID9 SID8 SID7 SID6
SID5 SID4 SID3 SID 2 SID1 SID 0
016C16
EID17 EID16 EID15 EID14 EID13 EID12 EID11 EID10 EID9 EID8 EID7 EID6
016E16
NOTES:
1.
is undefined.
2. These registers can be written in CAN reset/initialization mode of the CAN module.
Figure 17.5 Bit Mapping of Mask Registers in Word Access
page 291 of 458
C0LMAR register
016A16
EID5 EID4 EID3 EID2 EID1 EID0
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
C0GMR register
017016
C0LMBR register
17. CAN Module
M16C/29 Group
17.1.3 CAN SFR Registers
17.1.3.1 C0MCTLj Register (j = 0 to 15)
Figure 17.6 shows the C0MCTLj register.
CAN0 message control register j ( j = 0 to 15) (4)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
C0MCTL0 to C0MCTL15
Bit Symbol
Address
After Reset
0016
020016 to 020F16
Bit Name
Function
RW
RO
(1)
RO
(1)
NewData
Successful
reception flag
When set to reception slot
0: The content of the slot is read or still under
processing by the CPU
1 The CAN module has stored new data in the slot
SentData
Successful
transmission flag
When set to transmission slot
0: Transmission is not started or completed yet
1: Transmission is successfully completed
InvalData
When set to reception slot
"Under reception" 0: The message is valid
1: The message is invalid
flag
(The message is being updated)
RO
TrmActive
When set to transmission slot
"Under
0: Waiting for bus idle or completion of arbitration
transmission" flag
1: Transmitting
RO
MsgLost
RemActive
RspLock
Overwrite flag
Remote frame
transmission/
reception status
flag (2)
Auto response
lock mode select
bit
When set to reception slot
0: No message has been overwritten in this slot
1: This slot already contained a message, but it has
been overwritten by a new one
0: Data frame transmission/reception status
1: Remote frame automatic transfer status
When set to reception remote frame slot
0: After a remote frame is received, it will be
answered automatically
1: After a remote frame is received, no transmission
will be started as long as this bit is set to 1
(Not responding)
RO
(1)
RW
RW
Remote frame
corresponding
slot select bit
0: Slot not corresponding to remote frame
1: Slot corresponding to remote frame
RW
RecReq
Reception slot
request bit (3)
0: Not reception slot
1: Reception slot
RW
TrmReq
Transmission
slot request bit (3)
0: Not transmission slot
1: Transmission slot
RW
Remote
NOTES:
1. As for write, only writing 0 is possible. The value of each bit is written when the CAN module enters the respective state.
2. In Basic CAN mode, the slots 14 and 15 serve as data format identification flag. If the data frame is received, the RemActive
bit is set to 0. If the remote frame is received, the bit is set to 1.
3. One slot cannot be defined as reception slot and transmission slot at the same time.
4. Set these registers only when the CAN module is in CAN operating mode.
Figure 17.6 C0MCTLj Register
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17. CAN Module
M16C/29 Group
17.1.3.2 C0CTLR Register
Figure 17.7 shows the C0CTLR register.
CAN0 Control Register
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
C0CTLR
Bit Symbol
Address
021016
After reset
X00000012
Bit Name
Function
RW
0: Operation mode
CAN module
reset bit
(Note 1) 1: Reset/initialization mode
RW
LoopBack
Loop back mode
select bit (2)
0: Loop back mode disabled
1: Loop back mode enabled
RW
MsgOrder
Message order
select bit (2)
0: Word access
1: Byte access
RW
BasicCAN
Basic CAN mode
select bit (2)
0: Basic CAN mode disabled
1: Basic CAN mode enabled
RW
BusErrEn
Bus error interrupt
enable bit (2)
0: Bus error interrupt disabled
1: Bus error interrupt enabled
RW
Sleep mode
select bit (2, 3)
0: Sleep mode disabled
1: Sleep mode enabled; clock supply stopped
RW
CAN port enable bit
0: I/O port function
1: CTx/CRx function(4)
RW
Reset
Sleep
PortEn
(b7)
(2, 3)
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined
-
NOTES:
1. When the Reset bit is set to 1 (CAN reset/initialization mode), check that the State_Reset bit in the C0STR register is set to 1 (Reset mode).
2. Change this bit only in the CAN reset/initialization mode.
3. When using CAN0 wake-up interrupt, set these bits to 1.
4. When the PortEn bit is set to 1, set the PD9_2 bit in the PD9 register to 0.
(b15)
b7
b6
b5
b4
b3
b2
b1
(b8)
b0
Symbol
C0CTLR
Bit Symbol
Address
021116
After reset
XX0X00002
Bit Name
Function
RW
b1 b0
TSPreScale
Bit1, Bit0
TSReset
RetBusOff
(b4)
RXOnly
(b7-b6)
Time stamp
prescaler(3)
0 0: Period of 1 bit time
0 1: Period of 1/2 bit time
1 0: Period of 1/4 bit time
1 1: Period of 1/8 bit time
Time stamp counter 0: In an idle state
1: Force reset of the time stamp counter
reset bit(1)
RW
Return from bus off 0: In an idle state
command bit(2)
1: Force return from bus off
RW
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined
Listen-only mode
select bit (3)
0: Listen-only mode disabled
1: Listen-only mode enabled (4)
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined
NOTES:
1. When the TSReset bit is set to 1, the C0TSR register is set to 000016. After this, the bit is automatically set to 0.
2. When the RetBusOff bit is set to 1, registers C0RECR and C0TECR are set to 0016. After this, the bit is automatically set to 0.
3. Change this bit only in the CAN reset/initialization mode.
4. When the listen-only mode is selected, do not request the transmission.
Figure 17.7 C0CTLR Register
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RW
RW
-
17. CAN Module
M16C/29 Group
17.1.3.3 C0STR Register
Figure 17.8 shows the C0STR register.
CAN0 Status Register
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
C0STR
Bit Symbol
Address
021216
After Reset
0016
Bit Name
Function
RW
b3 b2 b1 b0
MBOX
TrmSucc
Active slot bits(1)
Successful
transmission flag(1)
0 0 0 0: Slot 0
0 0 0 1: Slot 1
0 0. 1 0: Slot 2
..
1 1 1 0: Slot 14
1 1 1 1: Slot 15
RO
0: No [successful] transmission
1: The CAN module has transmitted a message
successfully
RO
RecSucc
Successful reception 0: No [successful] reception
(1)
flag
1: CAN module received a message successfully
TrmState
Transmission flag
(Transmitter)
0: CAN module is idle or receiver
1: CAN module is transmitter
RO
RecState
Reception flag
(Receiver)
0: CAN module is idle or transmitter
1: CAN module is receiver
RO
RO
NOTE:
1. These bits can be changed only when a slot which an interrupt is enabled by the C0ICR register is transmitted or received successfully.
(b15)
b7
b6
b5
b4
b3
b2
b1
(b8)
b0
Symbol
C0STR
Bit Symbol
After Reset
X00000012
Bit Name
Function
RW
Reset state flag
0: Operation mode
1: Reset mode
RO
State_
LoopBack
Loop back state flag
0: Loop back mode disabled
1: Loop back mode enabled
RO
State_
MsgOrder
Message order
state flag
0: Word access
1: Byte access
RO
State_
BasicCAN
Basic CAN mode
state flag
0: Basic CAN mode disabled
1: Basic CAN mode enabled
RO
State_
BusError
Bus error
state flag
0: No error has occurred.
1: A CAN bus error has occurred.
RO
State_
ErrPass
Error passive
state flag
0: The CAN module is not in error passive state.
1: The CAN module is in error passive state.
RO
State_
BusOff
Error bus off
state flag
0: The CAN module is not in error bus off state.
1: The CAN module is in error bus off state.
RO
State_Reset
(b7)
Figure 17.8 C0STR Register
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Address
021316
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Nothing is assigned. If necessary, set to 0.
When read, the content is undefined
-
17. CAN Module
M16C/29 Group
17.1.3.4 C0SSTR Register
Figure 17.9 shows the C0SSTR register.
CAN0 Slot Status Register
(b15)
b7
(b8)
b0 b7
b0
Symbol
C0SSTR
Address
021516, 021416
Function
Slot status bits
Each bit corresponds to the slot with the
same number
After Reset
000016
Setting Values
0: Reception slot
The message has been read.
Transmission slot
Transmission is not completed.
1: Reception slot
The message has not been read.
Transmission slot
Transmission is completed
Figure 17.9 C0SSTR Register
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RW
RO
17. CAN Module
M16C/29 Group
17.1.3.5 C0ICR Register
Figure 17.10 shows the C0ICR register.
CAN0 Interrupt Control Register (1)
(b15)
b7
(b8)
b0 b7
b0
Symbol
C0ICR
Address
021716, 021616
After Reset
000016
Function
Setting Values
0: Interrupt disabled
Interrupt enable bits:
1: Interrupt enabled
Each bit corresponds with a slot with the same
number.
Enabled/disabled of successful transmission interrupt or successful reception interrupt can be selected
RW
RW
NOTE:
1. Set the C0ICR register only when the CAN module is in CAN operating mode.
Figure 17.10 C0ICR Register
17.1.3.6 C0IDR Register
Figure 17.11 shows the C0IDR register.
CAN0 extended ID register (1)
(b15)
b7
(b8)
b0 b7
b0
Symbol
C0IDR
Address
021916, 021816
Function
Extended ID bits:
Each bit corresponds with a slot with the same
number.
Selection of the ID format that each slot handles
NOTE:
1. Set the C0IDR register only when the CAN module is in CAN operating mode.
Figure 17.11 C0IDR Register
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After Reset
000016
Setting Values
0: Standard ID
1: Extended ID
RW
RW
17. CAN Module
M16C/29 Group
17.1.3.7 C0CONR Register
Figure 17.12 shows the C0CONR register.
CAN0 Configuration Register(2)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
C0CONR
Bit symbol
Address
021A16
After reset
Undefined
Bit name
Function
RW
b3 b2 b1 b0
0 0 0 0: Divide-by-1 of fCAN
0 0 0 1: Divide-by-2 of fCAN
0 0 1 0: Divide-by-3 of fCAN
.....
BRP
Prescaler division
ratio select bits
RW
1 1 1 0: Divide-by-15 of fCAN
1 1 1 1: Divide-by-16 of fCAN (1)
SAM
Sampling control bit
0: One time sampling
1: Three times sampling
RW
b7 b6 b5
0 0 0: 1Tq
0 0 1: 2Tq
0 1 0: 2Tq
RW
.....
PTS
Propagation time
segment control bits
1 1 0: 7Tq
1 1 1: 8Tq
NOTES:
1. fCAN serves for the CAN clock. The period is decided by configuration of the CCLKi bits (i = 0 to 2) in the CCLKR register.
2. Set the C0CONR register only when the CAN module is in CAN reset / initialization mode.
(b15)
b7
b6
b5
b4
b3
b2
b1
(b8)
b0
Symbol
C0CONR
Bit symbol
Address
021B16
After Reset
Undefined
Bit name
Function
RW
b2 b1b0
0 0 0: Do not set
0 0 1: 2Tq
0 1 0: 3Tq
RW
.....
PBS1
Phase buffer
segment 1
control bits
1 1 0: 7Tq
1 1 1: 8Tq
b5 b4 b3
0 0 0: Do not set
0 0 1: 2Tq
0 1 0: 3Tq
.....
PBS2
Phase buffer
segment 2
control bits
RW
1 1 0: 7Tq
1 1 1: 8Tq
b7 b6
SJW
Figure 17.12 C0CONR Register
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Resynchronization
jump width
control bits
0
0
1
1
0: 1Tq
1: 2Tq
0: 3Tq
1: 4Tq
RW
17. CAN Module
M16C/29 Group
17.1.3.8 C0RECR Register
Figure 17.13 shows the C0RECR register.
CAN0 Receive Error Count Register
b7
b0
Symbol
C0RECR
Address
021C16
After Reset
0016
Function
Counter Value
Reception error counting function
The value is incremented or decremented
according to the CAN module's error status
0016 to FF16 (1)
RW
RO
NOTE:
1. The value is undefined in bus off state.
Figure 17.13 C0RECR Register
17.1.3.9 C0TECR Register
Figure 17.14 shows the C0TECR register.
CAN0 Transmit Error Count Register (1)
b7
b0
Symbol
C0TECR
Address
021D16
After Reset
0016
Function
Transmission error counting function
The value is incremented or decremented
according to the CAN module's error status
NOTE:
1. The value is undefined in bus off state.
Figure 17.14 C0TECR Register
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Counter Value
0016 to FF16(1)
RW
RO
17. CAN Module
M16C/29 Group
17.1.3.10 C0TSR Register
Figure 17.15 shows the C0TSR register.
CAN0 Time Stamp Register(1)
(b15)
b7
(b8)
b0 b7
b0
Symbol
C0TSR
Address
021F16, 021E16
After Reset
000016
Function
Counter Value
Time stamp function
000016 to FFFF16
RW
RO
NOTE:
1. Use a 16-bit data for reading.
Figure 17.15 C0TSR Register
17.1.3.11 C0AFS Register
Figure 17.16 shows the C0AFS register.
CAN0 Acceptance Filter Support Register
(b15)
b7
(b8)
b0 b7
b0
Symbol
C0AFS
Function
Write the content equivalent to the standard frame
ID of the received message.
The value is "converted standard frame ID" when
read
Figure 17.16 C0AFS Register
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Address
024316, 024216
After reset
Undefined
Setting Values
RW
Standard frame ID
RW
17. CAN Module
M16C/29 Group
17.2 Operating Modes
The CAN module has the following four operating modes.
• CAN Reset/Initialization Mode
• CAN Operating Mode
• CAN Sleep Mode
• CAN Interface Sleep Mode
Figure 17.17 shows transition between operating modes.
MCU Reset
CAN reset/initialization
mode
State_Reset = 1
Sleep = 0
Reset = 0
CAN operating mode
Reset = 1
Sleep = 1
TEC > 255
CCLK3 = 1
CAN interface
sleep mode
CAN sleep mode
State_Reset = 0
Reset = 1
when 11 consecutive
recessive bits are
detected 128 times
or
RetBusOff = 1
Bus off state
State_BusOff = 1
CCLK3 = 0
CCLK3: Bit in the CCLKR register
Reset, Sleep, RetBusOff: Bits in the C0CTLR register
State_Reset, tate_BusOff: Bits in the C0STR register
Figure 17.17 Transition Between Operating Modes
17.2.1 CAN Reset/Initialization Mode
The CAN reset/initialization mode is activated upon MCU reset or by setting the Reset bit in the C0CTLR
register to 1. If the Reset bit is set to 1, check that the State_Reset bit in the C0STR register is set to 1.
Entering the CAN reset/initialization mode initiates the following functions by the module:
• CAN communication is impossible.
• When the CAN reset/initialization mode is activated during an ongoing transmission in operation
mode, the module suspends the mode transition until completion of the transmission (successful,
arbitration loss, or error detection). Then, the State_Reset bit is set to 1, and the CAN reset/
initialization mode is activated.
• Registers C0MCTLj (j = 0 to 15), C0STR, C0ICR, C0IDR, C0RECR, C0TECR, and C0TSR are
initialized. All these registers are locked to prevent CPU modification.
• Registers C0CTLR, C0CONR, C0GMR, C0LMAR, and C0LMBR and the CAN0 message box
retain their contents and are available for CPU access.
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17. CAN Module
M16C/29 Group
17.2.2 CAN Operating Mode
The CAN operating mode is activated by setting the Reset bit in the C0CTLR register to 0. If the Reset bit
is set to 0, check that the State_Reset bit in the C0STR register is set to 0.
If 11 consecutive recessive bits are detected after entering the CAN operating mode, the module initiates
the following functions:
• The module's communication functions are released and it becomes an active node on the network
and may transmit and receive CAN messages.
• Release the internal fault confinement logic including receive and transmit error counters. The
module may leave the CAN operating mode depending on the error counts.
Within the CAN operating mode, the module may be in three different sub modes, depending on which
type of communication functions are performed:
• Module idle : The modules receive and transmit sections are inactive.
• Module receives : The module receives a CAN message sent by another node.
• Module transmits : The module transmits a CAN message. The module may receive its own
message simultaneously when the LoopBack bit in the C0CTLR register = 1
(Loop back mode enabled).
Figure 17.18 shows sub modes of the CAN operating mode.
Module idle
TrmState = 0
RecState = 0
Start
transmission
Finish
transmission
Finish
reception
Module transmits
Detect
an SOF
Module receives
TrmState = 1
RecState = 0
TrmState = 0
RecState = 1
Lost in arbitration
TrmState, RecState: Bits in the C0STR register
Figure 17.18 Sub Modes of CAN Operating Mode
17.2.3 CAN Sleep Mode
The CAN sleep mode is activated by setting the Sleep bit in the C0CTLR register to 1. It should never be
activated from the CAN operating mode but only via the CAN reset/initialization mode.
Entering the CAN sleep mode instantly stops the clock supply to the module and thereby reduces power
dissipation.
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17. CAN Module
M16C/29 Group
17.2.4 CAN Interface Sleep Mode
The CAN interface sleep mode is activated by setting the CCLK3 bit in the CCLKR register to 1. It should
never be activated but only via the CAN sleep mode.
Entering the CAN interface sleep mode instantly stops the clock supply to the CPU Interface in the module and thereby reduces power dissipation.
17.2.5 Bus Off State
The bus off state is entered according to the fault confinement rules of the CAN specification. When
returning to the CAN operating mode from the bus off state, the module has the following two cases.
In this time, the value of any CAN registers, except registers C0STR, C0RECR, and C0TECR, does not
change.
(1) When 11 consecutive recessive bits are detected 128 times
The module enters instantly into error active state and the CAN communication becomes possible
immediately.
(2) When the RetBusOff bit in the C0CTLR register = 1 (Force return from buss off)
The module enters instantly into error active state, and the CAN communication becomes possible
again after 11 consecutive recessive bits are detected.
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17. CAN Module
M16C/29 Group
17.3 Configuration of the CAN Module System Clock
The M16C/29 Group has a CAN module system clock select circuit.
Configuration of the CAN module system clock can be done through manipulating the CCLKR register and
the BRP bit in the C0CONR register.
For the CCLKR register, refer to 7. Clock Generation Circuit.
Figure 17.19 shows a block diagram of the clock generation circuit of the CAN module system.
f1
Divide-by-1 (undivided)
Divide-by-2
Divide-by-4
Divide-by-8
Value: 1, 2, 4, 8, 16 Divide-by-16
CAN module
system clock
divider
fCAN
Prescaler
Baud rate
prescaler
division value
:P+1
1/2
CCLKR register
fCANCLK
CAN module
fCAN:
CAN module system clock
P:
The value written in the BRP bit of the C0CONR register. P = 0 to 15
fCANCLK: CAN communication clock fCANCLK = fCAN/2(P + 1)
Figure 17.19 Block Diagram of CAN Module System Clock Generation Circuit
17.3.1 Bit Timing Configuration
The bit time consists of the following four segments:
• Synchronization segment (SS)
This serves for monitoring a falling edge for synchronization.
• Propagation time segment (PTS)
This segment absorbs physical delay on the CAN network which amounts to double the total sum
of delay on the CAN bus, the input comparator delay, and the output driver delay.
• Phase buffer segment 1 (PBS1)
This serves for compensating the phase error. When the falling edge of the bit falls later than
expected, the segment can become longer by the maximum of the value defined in SJW.
• Phase buffer segment 2 (PBS2)
This segment has the same function as the phase buffer segment 1. When the falling edge of the
bit falls earlier than expected, the segment can become shorter by the maximum of the value
defined in SJW.
Figure 17.20 shows the bit timing.
Bit time
SS
PTS
PBS2
PBS1
SJW
SJW
Sampling point
The range of each segment: Bit time = 8 to 25Tq
SS = 1Tq
PTS = 1Tq to 8Tq
PBS1 = 2Tq to 8Tq
PBS2 = 2Tq to 8Tq
SJW = 1Tq to 4Tq
Figure 17.20 Bit Timing
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Configuration of PBS1 and PBS2: PBS1 ≥ PBS2
PBS1 ≥ SJW
PBS2 ≥ 2 when SJW = 1
PBS2 ≥ SJW when 2 ≤ SJW ≤ 4
17. CAN Module
M16C/29 Group
17.3.2 Bit-rate
Bit-rate depends on f1, the division value of the CAN module system clock, the division value of the baud
rate prescaler, and the number of Tq of one bit.
Table 17.2 shows the examples of bit-rate.
Table 17.2 Examples of Bit-rate
Bit-rate
20MHz
1Mbps
10Tq (1)
500kbps
10Tq (2)
20Tq (1)
125kbps
10Tq (8)
20Tq (4)
83.3kbps
10Tq (12)
20Tq (6)
33.3kbps
10Tq (30)
20Tq (15)
16MHz
8Tq (1)
8Tq (2)
16Tq (1)
8Tq (8)
16Tq (4)
8Tq (12)
16Tq (6)
8Tq (30)
16Tq (15)
10MHz
10Tq (1)
10Tq (4)
20Tq (2)
10Tq (6)
20Tq (3)
10Tq (15)
-
8MHz
8Tq (1)
8Tq (4)
16Tq (2)
8Tq (6)
16Tq (3)
8Tq (15)
-
NOTE:
1. The number in ( ) indicates a value of “fCAN division value” multiplied by “baud rate prescaler division value”.
Calculation of Bit-rate
f1
2 ✕ “fCAN division value (Note 1)” ✕ “baud rate prescaler division value (Note 2)” ✕ “number of Tq of one bit”
Note 1: fCAN division value = 1, 2, 4, 8, 16
fCAN division value: a value selected in the CCLKR register
Note 2: Baud rate prescaler division value = P + 1 (P: 0 to 15)
P: a value selected in the BRP bit in the C0CONR register
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17. CAN Module
M16C/29 Group
17.4 Acceptance Filtering Function and Masking Function
These functions serve the users to select and receive a facultative message. The C0GMR register, the
C0LMAR register, and the C0LMBR register can perform masking to the standard ID and the extended ID
of 29 bits. The C0GMR register corresponds to slots 0 to 13, the C0LMAR register corresponds to slot 14,
and the C0LMBR register corresponds to slot 15. The masking function becomes valid to 11 bits or 29 bits
of a received ID according to the value in the corresponding slot of the C0IDR register upon acceptance
filtering operation. When the masking function is employed, it is possible to receive a certain range of IDs.
Figure 17.21 shows correspondence of the mask registers and slots, Figure 17.22 shows the acceptance
function.
C0GMR register
Slot #0
Slot #1
Slot #2
Slot #3
Slot #4
Slot #5
Slot #6
Slot #7
Slot #8
Slot #9
Slot #10
Slot #11
Slot #12
Slot #13
C0LMAR register
C0LMBR register
Slot #14
Slot #15
Figure 17.21 Correspondence of Mask Registers to Slots
ID stored in
ID of the
the slot
received message
The value of the
mask register
Mask Bit Values
0: ID (to which the received message
corresponds) match is handled as
"Don't care"
1: ID (to which the received message
corresponds) match is checked
Acceptance Signal
Acceptance judge signal
0: The CAN module ignores the
current incoming message
(Not stored in any slot)
1: The CAN module stores the
current incoming message in
a slot of which ID matches
Figure 17.22 Acceptance Function
When using the acceptance function, note the following points.
(1) When one ID is defined in two slots, the one with a smaller number alone is valid.
(2) When it is configured that slots 14 and 15 receive all IDs with Basic CAN mode, slots 14 and 15
receive all IDs which are not stored into slots 0 to 13.
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17. CAN Module
M16C/29 Group
17.5 Acceptance Filter Support Unit (ASU)
The acceptance filter support unit has a function to judge valid/invalid of a received ID through table search.
The IDs to receive are registered in the data table; a received ID is stored in the C0AFS register, and table
search is performed with a decoded received ID. The acceptance filter support unit can be used for the IDs
of the standard frame only.
The acceptance filter support unit is valid in the following cases.
• When the ID to receive cannot be masked by the acceptance filter.
(Example) IDs to receive: 07816, 08716, 11116
• When there are too many IDs to receive; it would take too much time to filter them by software.
Figure 17.23 shows the write and read of the C0AFS register in word access.
bit 15
When write
bit 8
bit 7
SID10 SID9 SID8 SID7 SID6
bit 0
SID5 SID4 SID3 SID2 SID1 SID 0
Address
CAN0
24216
3/8 Decoder
bit 15
bit 8
When read
bit 7
Figure 17.23 Write/read of C0AFS Register in Word Access
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SID10 SID9 SID8 SID7 SID6 SID5 SID4 SID 3
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24216
17. CAN Module
M16C/29 Group
17.6 BasicCAN Mode
When the BasicCAN bit in the C0CTLR register is set to 1 (Basic CAN mode enabled), slots 14 and 15
correspond to Basic CAN mode. During normal operations, individual slots can select either data frame or
remote frame by CPU setting. However, in Basic CAN mode, both frames can be selected.
When slots 14 and 15 are defined as reception slots in Basic CAN mode, received messages are stored in
slots 14 and 15 alternately.
The received message data format can be determined by the RemActive bit in the C0MCTLj register (j = 0
to 15).
Figure 17.24 shows the operation of slots 14 and 15 in Basic CAN mode.
Slot 14
Slot 15
Empty
Locked (empty)
Msg n
Msg n
Locked (empty)
Locked (Msg n)
Msg n + 1
Msg n+1
Msg n+2 (Msg n lost)
Locked (Msg n+1)
Msg n+2
Figure 17.24 Operation of Slots 14 and 15 in Basic CAN Mode
When using Basic CAN mode, note the following points.
(1) Setting of Basic CAN mode has to be done in CAN reset/initialization mode.
(2) Select the same ID for slots 14 and 15. Also, setting of the C0LMAR and C0LMBR register has to be
the same.
(3) Define slots 14 and 15 as reception slot only.
(4) There is no protection available against message overwrite. A message can be overwritten by a new
message.
(5) Slots 0 to 13 can be used in the same way as in normal CAN operating mode.
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17. CAN Module
M16C/29 Group
17.7 Return from Bus off Function
When the protocol controller enters bus off state, it is possible to make it forced return from bus off state by
setting the RetBusOff bit in the C0CTLR register to 1 (Force return from bus off). At this time, the error state
changes from bus off state to error active state. If the RetBusOff bit is set to 1, registers C0RECR and
C0TECR are initialized and the State_Reset bit in the C0STR register is set to 0 (The CAN module is not in
error bus off state). However, registers of the CAN module such as C0CONR register and the content of
each slot are not initialized.
17.8 Time Stamp Counter and Time Stamp Function
When the C0TSR register is read, the value of the time stamp counter at the moment is read. The period of
the time stamp counter reference clock is the same as that of 1 bit time that is configured by the C0CONR
register. The time stamp counter functions as a free run counter.
The 1 bit time period can be divided by 1 (undivided), 2, 4 or 8 to produce the time stamp counter reference
clock. Use the TSPreScale bit in the C0CTLR register to select the divide-by-n value.
The time stamp counter is equipped with a register that captures the counter value when the protocol
controller regards it as a successful reception. The captured value is stored when a time stamp value is
stored in a reception slot.
17.9 Listen-Only Mode
When the RXOnly bit in the C0CTLR register is set to 1, the module enters listen-only mode.
In listen-only mode, no transmission -- data frames, error frames, and ACK response -- is performed to bus.
When listen-only mode is selected, do not request the transmission.
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17. CAN Module
M16C/29 Group
17.10 Reception and Transmission
Configuration of CAN Reception and Transmission Mode
Table 17.3 shows configuration of CAN reception and transmission mode.
Table 17.3 Configuration of CAN Reception and Transmission Mode
TrmReq RecReq Remote RspLock
0
0
-
-
0
1
1
0
0
1
0
0
Communication mode of the slot
Communication environment configuration mode:
configure the communication mode of the slot.
Configured as a reception slot for a data frame.
Configured as a transmission slot for a remote frame. (At this time
the RemActive = 1.)
After completion of transmission, this functions as a reception slot
for a data frame. (At this time the RemActive = 0.)
However, when an ID that matches on the CAN bus is detected
before remote frame transmission, this immediately functions as
1
0
0
1
0
1
0
1/0
a reception slot for a data frame.
Configured as a transmission slot for a data frame.
Configured as a reception slot for a remote frame. (At this time
the RemActive = 1.)
After completion of reception, this functions as a transmission slot
for a data frame. (At this time the RemActive = 0.)
However, transmission does not start as long as RspLock bit
remains 1; thus no automatic response.
Response (transmission) starts when the RspLock bit is set to 0.
TrmReq, RecReq, Remote, RspLock, RemActive, RspLock: Bits in the C0MCTLj register (j = 0 to 15)
When configuring a slot as a reception slot, note the following points.
(1) Before configuring a slot as a reception slot, be sure to set the C0MCTLj register (j = 0 to 15) to 0016.
(2) A received message is stored in a slot that matches the condition first according to the result of
reception mode configuration and acceptance filtering operation. Upon deciding in which slot to
store, the smaller the number of the slot is, the higher priority it has.
(3) In normal CAN operating mode, when a CAN module transmits a message of which ID matches, the
CAN module never receives the transmitted data. In loop back mode, however, the CAN module
receives back the transmitted data. In this case, the module does not return ACK.
When configuring a slot as a transmission slot, note the following points.
(1) Before configuring a slot as a transmission slot, be sure to set the C0MCTLj registers to 0016.
(2) Set the TrmReq bit in the C0MCTLj register to 0 (not transmission slot) before rewriting a transmission
slot.
(3) A transmission slot should not be rewritten when the TrmActive bit in the C0MCTLj register is 1
(transmitting).
If it is rewritten, an undefined data will be transmitted.
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17. CAN Module
M16C/29 Group
17.10.1 Reception
Figure 17.25 shows the behavior of the module when receiving two consecutive CAN messages, that fit
into the slot of the shown C0MCTLj register (j = 0 to 15) and leads to losing/overwriting of the first
message.
SOF
ACK
EOF
IFS
SOF
ACK
EOF
IFS
CANbus
InvalData bit
(2)
NewData bit
(2)
(5)
(4)
(5)
MsgLost bit
CAN0 Successful
Reception Interrupt
(5)
(3)
(1)
RecSucc bit
MBOX bit
Receive slot No.
C0STR register
RecState bit
C0MCTLj register
RecReq bit
j = 0 to 15
Figure 17.25 Timing of Receive Data Frame Sequence
(1) On monitoring a SOF on the CAN bus the RecState bit in the C0STR register becomes 1 (CAN module
is receiver) immediately, given the module has no transmission pending.
(2) After successful reception of the message, the NewData bit in the C0MCTLj register (j = 0 to 15) of the
receiving slot becomes 1 (stored new data in slot). The InvalData bit in the C0MCTLj register
becomes 1 (message is being updated) at the same time and the InvalData bit becomes 0 (message is
valid) again after the complete message was transferred to the slot.
(3) When the interrupt enable bit in the C0ICR register of the receiving slot = 1 (interrupt enabled), the
CAN0 successful reception interrupt request is generated and the MBOX bit in the C0STR register is
changed. It shows the slot number where the message was stored and the RecSucc bit in the
C0STR register is active.
(4) Read the message out of the slot after setting the New Data bit to 0 (the content of the slot is read or
still under processing by the CPU) by program.
(5) If the NewData bit is set to 0 by program or the next CAN message is received successfully before the
receive request for the slot is canceled, the MsgLost bit in the C0MCTLj register is set to 1 (message
has been overwritten). The new received message is transferred to the slot. Generating of an
interrupt request and change of the C0STR register are same as in 3).
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17. CAN Module
M16C/29 Group
17.10.2 Transmission
Figure 17.26 shows the timing of the transmit sequence.
SOF
ACK
EOF
IFS
SOF
(1)
(4)
TrmActive bit
(1)
(2)
(3)
SentData bit
(3)
CAN0 Successful
Transmission Interrupt
(3)
TrmState bit
(1)
(2)
TrmSucc bit
MBOX bit
Transmission slot No.
C0STR register
TrmReq bit
C0MCTLj register
CTx
j = 0 to 15
Figure 17.26 Timing of Transmit Sequence
(1) If the TrmReq bit in the C0MCTLj register (j = 0 to 15) is set to 1 (Transmission slot) in the bus idle
state, the TrmActive bit in the C0MCTLj register and the TrmState bit in the C0STR register are set to
1 (Transmitting/Transmitter), and CAN module starts the transmission.
(2) If the arbitration is lost after the CAN module starts the transmission, the TrmActive and TrmState bits
are set to 0.
(3) If the transmission has been successful without lost in arbitration, the SentData bit in the C0MCTLj
register is set to 1 (Transmission is successfully completed) and TrmActive bit in the C0MCTLj register
is set to 0 (Waiting for bus idle or completion of arbitration). And when the interrupt enable bits in the
C0ICR register = 1 (Interrupt enabled), CAN0 successful transmission interrupt request is generated
and the MBOX (the slot number which transmitted the message) and TrmSucc bit in the C0STR
register are changed.
(4) When starting the next transmission, set bits SentData and TrmReq to 0. And set the TrmReq bit to
1 after checking that bits SentData and TrmReq are set to 0.
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17. CAN Module
M16C/29 Group
17.11 CAN Interrupts
The CAN module provides the following CAN interrupts.
• CAN0 Successful Reception Interrupt
• CAN0 Successful Transmission Interrupt
• CAN0 Error Interrupt
Error Passive State
Error BusOff State
Bus Error (this feature can be disabled separately)
• CAN0 Wake-up Interrupt
When the CPU detects the CAN0 successful reception/transmission interrupt request, the MBOX bit in the
C0STR register must be read to determine which slot has generated the interrupt request.
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18. CRC Calculation Circuit
M16C/29 Group
18. CRC Calculation Circuit
The Cyclic Redundancy Check (CRC) calculation detects errors in blocks of data. The MCU uses a generator polynomial of CRC_CCITT (X16 + X12 + X5 + 1) or CRC-16 (X16 + X15 + X2 + 1) to generate CRC
code.
The CRC code is a 16-bit code generated for a block of a given data length in multiples of bytes. The code
is updated in the CRC data register everytime one byte of data is transferred to a CRC input register. The
data register must be initialized before use. Generation of CRC code for one byte of data is completed in
two machine cycles.
Figure 18.1 shows the block diagram of the CRC circuit. Figure 18.2 shows the CRC-related registers.
Figure 18.3 shows the calculation example using the CRC_CCITT operation.
18.1 CRC Snoop
The CRC circuit includes the ability to snoop reads and writes to certain SFR addresses. This can be used
to accumulate the CRC value on a stream of data without using extra bandwidth to explicitly write data into
the CRCIN register. All SFR addresses after 002016 are subject to the CRC snoop. The CRC snoop is
useful to snoop the writes to a UART TX buffer, or the reads from a UART RX buffer.
To snoop an SFR address, the target address is written to the CRC snoop Address Register (CRCSAR).
The two most significant bits of this register enable snooping on reads or writes to the target address. If the
target SFR is written to by the CPU or DMA, and the CRC snoop write bit is set (CRCSW=1), the CRC will
latch the data into the CRCIN register. The new CRC code will be set in the CRCD register.
Similarly, if the target SFR is read by the CRC or DMA, and the CRC snoop read bit is set (CRCSR=1), the
CRC will latch the data from the target into the CRCIN register and calculate the CRC.
The CRC circuit can only calculate CRC codes on data byte at a time. Therefore, if a target SFR is
accessed in word (16 bit), only one low-order byte data is stored into the CRCIN register.
Data bus high-order
Data bus low-order
AAAAA
AAAAA
AAAAAAAAAA
AAAAAAAAAA
AAAAAAAA
AAAAAAAAAA
AAAAAAAA
AAAAAAAAAA
AAAAAAAA
AAAAAAAA
AAAAAA
AAAAAAAA
AAAAAA
AAAAAAAA
AAAAAAAA
Eight low-order bits
Eight high-order bits
CRCD register (16)
x
16
CRC code generating circuit
+ x12 + x5 + 1 OR x16 + x15 + x2 + 1
(Address 03BE16)
Address Bus
Figure 18.1 CRC circuit block diagram
page 313 of 458
SnoopB
lock
Snoop Address
Equal?
CRC input register (8)
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REJ09B0101-0112
(Address 03BD16, 03BC16)
Snoop
enable
18. CRC Calculation Circuit
M16C/29 Group
CRC Data Register
(b15)
b7
(b8)
b0 b7
b0
Symbol
CRCD
Address
03BD16 to 03BC16
After Reset
Undefined
Function
Setting Range RW
000016 to FFFF16 RW
CRC calculation result output
CRC Input Register
b7
Symbol
CRCIN
b0
Address
03BE16
After Reset
Undefined
Setting Range RW
Function
Data input
0016 to FF16
RW
CRC Mode Register
b7
Symbol
CRCMR
b0
Bit
Bitsymbol
Symbol
Address
03B616
After Reset
0XXXXXX02
BitBit
name
Name
Function
0: X16+X12+X5+1 (CRC-CCITT)
CRC
CRC
mode
mode
polynomial
polynomial
selection
selection
bitbit
1: X16+X15+X2+1 (CRC-16)
Nothing is assigned. If necessary, set to 0.
Nothing is assigned.
(b6-b1)
the
content
is undefined
Write "0" when When
writingread,
to this
bit.
The value
is indeterminate if read.
0: LSB first
CRC
mode
mode
selection
selection
bitbit
CRCMS
CRCMS CRC
1: MSB first
CRCPS
CRCPS
RW
RW
RW
SFR Snoop Address Register
(b15)
b7
(b8)
b0 b7
b0
Symbol
CRCSAR
Bit Symbol
CRCSAR9-0
(b13-b10)
CRCSR
CRCSW
Address
03B516 to 03B416
Bit Name
CRC mode polynomial
selection bit
After Reset
00XXXXXX XXXXXXXX2
Function
SFR address to snoop
CRC snoop on read
enable bit
CRC snoop on write
enable bit
Figure 18.2. CRCD, CRCIN, CRCMR, CRCSAR Register
page 314 of 458
RW
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined
0: Disabled
1: Enabled(1)
0: Disabled
1: Enabled(1)
NOTE:
1. Set bits CRCSR and CRCSW to 0 if the PLC07 bit in the PLC0 register is set to 1 (PLL on) and the PM20 bit in
the PM2 register is set to 0 (SFR access 2 wait).
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
RW
RW
RW
18. CRC Calculation Circuit
M16C/29 Group
b15
b0
(1) Setting 000016 (initial value)
CRD data register CRCD
[03BD16, 03BC16]
b7
b0
(2) Setting 0116
CRC input register CRCIN
[03BE16]
2 cycles
After CRC calculation is complete
b0
b15
CRD data register CRCD
[03BD16, 03BC16]
118916
Stores CRC code
The code resulting from sending 0116 in LSB first mode is (10000 0000).This the CRC code in the generating polynomial,
(X16 + X12 + X5 + 1), becomes the remainder resulting from dividing (1000 0000)X16 by ( 1 0001 0000 0010 0001) in
conformity with the modulo-2 operation.
LSB
1000 1000
1 0001 0000 0010 0001 1000 0000 0000
1000 1000 0001
1000 0001
1000 1000
1001
0000
0000
0000
0001
0001
0000
1
1000
0000
1000
8
0+0=0
0+1=1
1+0=1
1+1=0
-1 = 1
0000
0
1
1000
MSB
LSB
9
MSB
Modulo-2 operation is
operation that complies
with the law given below.
1
1
Thus the CRC code becomes ( 1001 0001 1000 1000). Since the operation is in LSB first mode, the (1001 0001 1000 1000)
corresponds to 118916 in hexadecimal notation. If the CRC operation in MSB first mode is necessary, set the CRC mode
selection bit to 1. CRC data register stores CRC code for MSB first mode.
b7
b0
(3) Setting 2316
CRC input register CRCIN
[03BE16]
After CRC calculation is complete
b15
b0
0A4116
CRD data register CRCD
[03BD16, 03BC16]
Stores CRC code
Figure 18.3. CRC Calculation
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M16C/29 Group
19. Programmable I/O Ports
19. Programmable I/O Ports
Note
Ports P04 to P07, P10 to P14 , P34 to P37 and P95 to P97 are not available in 64-pin package.
The programmable input/output ports (hereafter referred to simply as “I/O ports”) consist of 71 lines P0, P1,
P2, P3, P6, P7, P8, P9, P10 (except P94) for the 80-pin package, or 55 lines P00 to P03, P15 to P17, P2, P30
to P33, P6, P7, P8, P90 to P93, P10 for the 64-pin package. Each port can be set for input or output every
line by using a direction register, and can also be chosen to be or not be pulled high in sets of 4 lines.
Figures 19.1 to 19.4 show the I/O ports. Figure 19.5 shows the I/O pins.
Each pin functions as an I/O port, a peripheral function input/output.
For details on how to set peripheral functions, refer to each functional description in this manual. If any pin
is used as a peripheral function input, set the direction bit for that pin to 0 (input mode). Any pin used as an
output pin for peripheral functions is directed for output no matter how the corresponding direction bit is set.
19.1 Port Pi Direction Register (PDi Register, i = 0 to 3, 6 to 10)
Figure 19.6 shows the direction registers.
This register selects whether the I/O port is to be used for input or output. The bits in this register correspond one for one to each port.
19.2 Port Pi Register (Pi Register, i = 0 to 3, 6 to 10)
Figure 19.7 shows the Pi registers.
Data input/output to and from external devices are accomplished by reading and writing to the Pi register.
The Pi register consists of a port latch to hold the output data and a circuit to read the pin status. For ports
set for input mode, the input level of the pin can be read by reading the corresponding Pi register, and data
can be written to the port latch by writing to the Pi register.
For ports set for output mode, the port latch can be read by reading the corresponding Pi register, and data
can be written to the port latch by writing to the Pi register. The data written to the port latch is output from
the pin. The bits in the Pi register correspond one for one to each port.
19.3 Pull-up Control Register 0 to 2 (PUR0 to PUR2 Registers)
Figure 19.8 shows registers PUR0 to PUR2.
Registers PUR0 to PUR2 select whether the pins, divided into groups of four pins, are pulled up or not. The
pins, selected by setting the bits in registers PUR0 to PUR2 to 1 (pull-up), are pulled up when the direction
registers are set to 0 (input mode). The pins are pulled up regardless of the pins’ function.
19.4 Port Control Register (PCR Register)
Figure 19.9 shows the port control register.
When the P1 register is read after setting the PCR0 bit in the PCR register to 1, the corresponding port latch
can be read no matter how the PD1 register is set.
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19. Programmable I/O Ports
M16C/29 Group
19.5 Pin Assignment Control Register (PACR)
Figure 19.10 shows the PACR register. After reset, set bits PACR2 to PACR0 in the PACR register before
a signal is input or output to each pin. When bits PACR2 to PACR0 are not set, some pins do not function
as I/O ports.
Bits PACR2 to PACR0: control pins to be used
Value after reset: 0002.
To select the 80-pin package, set the bits to 0112.
To select the 64-pin package, set the bits to 0102.
U1MAP bit: controls pin assignments for the UART1 function.
_________ _________
To assign the UART1 function to P64/CTS1/RTS1, P65/CLK1, P66/RxD1, and P67/TxD1, set the U1MAP
bit to 0 (P67 to P64).
________ ________
To assign the function to P70/CTS1/RTS1, P71/CLK1, P72/RxD1, and P73/TxD1, set the U1MAP bit to 1
(P73 to P70)
The PRC2 bit in the PRCR protects the PACR register. Set the PACR register after setting the PRC2 bit in
the PRCR register.
19.6 Digital Debounce Function
Two digital debounce function circuits are provided. Level is determined when level is held, after applying
either a falling edge or rising edge to the pin, longer than the programmed filter width time. This enables
noise reduction.
________
_______ _____
This function is assigned to INT5/INPC17 and NMI/SD. Digital filter width is set in the NDDR register and
the P17DDR register respectively. Figure 19.11 shows the NDDR register and the P17DDR register.
Additionally, a digital debounce function is disabled to the port P17 input and the port P85 input.
Filter width : (n+1) x 1/f8
n: count value set in the NDDR register and P17DDR register
The NDDR register and the P17DDR register decrement count value with f8 as the count source. The
NDDR register and the P17DDR register indicate count time. Count value is reloaded if a falling edge or a
rising edge is applied to the pin.
The NDDR register and the P17DDR register can be set 0016 to FF16 when using the digital debounce
function. Setting to FF16 disables the digital filter. See Figure 19.12 for details.
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M16C/29 Group
19. Programmable I/O Ports
Pull-up selection
Direction register
P00 to P07, (inside dotted-line included)
P100 to P103
Port latch
Data bus
(1)
P30 to P37 (inside dotted-line not included)
Analog input
Pull-up selection
P10 to P13
Direction register
(inside dotted-line included)
Port P1 control register
Port latch
Data bus
P14
(1)
(inside dotted-line not included)
Analog input
Pull-up selection
P15, P16
Direction register
(inside dotted-line not included)
Port P1 control register
Data bus
P17
Port latch
(1)
(inside dotted-line included)
Input to respective peripheral functions
Digital
debounce
INPC17/INT5
Pull-up selection
P22 to P27, P30, P60, P61, P64,
P65, P74 to P76, P80, P81
(inside dotted-line included)
Direction
register
Data bus
Port latch
"1"
Output
(1)
P32
(inside dotted-line not included)
Input to respective peripheral functions
NOTE:
1.
symbolizes a parasitic diode.
Make sure the input voltage on each port will not exceed Vcc.
Figure 19.1 I/O Ports (1)
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19. Programmable I/O Ports
M16C/29 Group
Pull-up selection
Direction
register
P20, P21, P70 to P73
Port latch
Data bus
"1"
Output
Switching
between
CMOS and
Nch
(1)
Input to respective peripheral functions
Pull-up selection
P82 to P84
Direction register
Data bus
Port latch
(1)
Input to respective peripheral functions
Pull-up selection
Direction register
P31, P62, P66, P77
Data bus
Port latch
(1)
Input to respective peripheral functions
NOTE:
1.
symbolizes a parasitic diode.
Make sure the input voltage on each port will not exceed Vcc.
Figure 19.2 I/O Ports (2)
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M16C/29 Group
19. Programmable I/O Ports
Pull-up selection
Direction register
P63, P67
“1”
Output
Port latch
Data bus
(1)
Switching between CMOS and Nch
Pull-up selection
P85
NMI Enable
Direction register
Port latch
Data bus
(1)
Digital Debounce
NMI Interrupt Input
NMI Enable
SD
Pull-up selection
P91, P92, P97,
P104 to P107
Direction register
Data bus
Port latch
(1)
Analog input
Input to respective peripheral functions
NOTE:
1.
symbolizes a parasitic diode.
Make sure the input voltage on each port will not exceed Vcc.
Figure 19.3 I/O Ports (3)
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19. Programmable I/O Ports
M16C/29 Group
P90, P95
(inside dotted-line
included)
P93, P96
(inside dotted-line
not included)
Data bus
Pull-up selection
Direction register
1
Port latch
Output
(1)
Analog input
Input to respective peripheral functions
Pull-up selection
Direction register
P87
Data bus
Port latch
(1)
fc
Rf
Pull-up selection
Rd
Direction register
P86
Data bus
Port latch
(1)
NOTE:
1.
symbolizes a parasitic diode.
Make sure the input voltage on each port will not exceed Vcc.
Figure 19.4 I/O Ports (4)
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M16C/29 Group
19. Programmable I/O Ports
CNVSS
CNVSS signal input
(1)
RESET
RESET signal input
(1)
NOTE:
1.
symbolizes a parasitic diode.
Make sure the input voltage on each port will not exceed Vcc.
Figure 19.5 I/O Pins
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19. Programmable I/O Ports
M16C/29 Group
Port Pi Direction Register (i=0 to 3, 6 to 8, and 10) (1)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
PD0 to PD3
PD6 to PD8
PD10
Bit Symbol
Address
03E2 16, 03E3 16, 03E6 16, 03E7 16
03EE 16, 03EF 16, 03F2 16
03F6 16
Bit Name
PDi_0
Port Pi 0 direction bit
PDi_1
Port Pi 1 direction bit
PDi_2
Port Pi 2 direction bit
PDi_3
Port Pi 3 direction bit
PDi_4
Port Pi 4 direction bit
PDi_5
Port Pi 5 direction bit
PDi_6
Port Pi 6 direction bit
PDi_7
Port Pi 7 direction bit
After Reset
0016
0016
0016
Function
0: Input mode
(Functions as an input port)
1: Output mode
(Functions as an output port)
(i = 0 to 3, 6 to 8, and 10)
RW
RW
RW
RW
RW
RW
RW
RW
RW
NOTE:
1. Set the PACR register.
In 80-pin package, set bits PACR2, PACR1, PACR0 to 0112.
In 64-pin package, set bits PACR2, PACR1, PACR0 to 0102.
Port P9 Direction Register (1,2)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
PD9
Bit Symbol
Address
03F316
Bit Name
PD9_0
Port P9 0 direction bit
PD9_1
Port P9 1 direction bit
PD9_2
Port P9 2 direction bit
PD9_3
(b4)
Port P9 3 direction bit
After Reset
000X00002
Function
0: Input mode
(Functions as an input port)
1: Output mode
(Functions as an output port)
RW
RW
RW
RW
RW
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined
PD9_5
Port P9 5 direction bit
PD9_6
Port P9 6 direction bit
PD9_7
Port P9 7 direction bit
0: Input mode
(Functions as an input port)
1: Output mode
(Functions as an output port)
RW
RW
RW
NOTES:
1. Make sure the PD9 register is written to by the next instruction after setting the PRC2 bit in the
PRCR register to 1(write enabled).
2. Set the PACR register.
In 80-pin package, set bits PACR2, PACR1, PACR0 to 0112.
In 64-pin package, set bits PACR2, PACR1, PACR0 to 0102.
Figure 19.6 PD0 to PD3 and PD6 to PD10 Registers
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M16C/29 Group
19. Programmable I/O Ports
Port Pi Register (i=0 to 3, 6 to 8 and 10)(1)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
P0 to P3
P6 to P8
P10
Bit Symbol
Address
03E016, 03E116, 03E416, 03E516
03EC16, 03ED16, 03F016
03F416
Bit Name
Pi_0
Port Pi0 bit
Pi_1
Port Pi1 bit
Pi_2
Port Pi2 bit
Pi_3
Port Pi3 bit
Pi_4
Port Pi4 bit
Pi_5
Port Pi5 bit
Pi_6
Port Pi6 bit
Pi_7
Port Pi7 bit
After Reset
Undefined
Undefined
Undefined
Function
The pin level on any I/O port which is
set for input mode can be read by
reading the corresponding bit in this
register. The pin level on any I/O port
which is set for output mode can be
controlled by writing to the
corresponding bit in this register
0: “L” level
1: “H” level (1)
(i = 0 to 3, 6 to 8 and 10)
RW
RW
RW
RW
RW
RW
RW
RW
RW
NOTE:
1. Set the PACR register.
In 80-pin package, set bits PACR2, PACR1, PACR0 to 0112.
In 64-pin package, set bits PACR2, PACR1, PACR0 to 0102.
Port P9 Register
b7
b6
b5
b4
b3
b2
(1)
b1
b0
Symbol
P9
Address
03F1 16
Bit Symbol
After Reset
Undefined
Bit Name
P9_0
Port P90 bit
P9_1
Port P91 bit
P9_2
Port P92 bit
P9_3
Port P93 bit
(b4)
Nothing is assigned (2)
P9_5
Port P95 bit
P9_6
Port P96 bit
P9_7
Port P97 bit
Function
The pin level on any I/O port which is
set for input mode can be read by
reading the corresponding bit in this
register. The pin level on any I/O port
which is set for output mode can be
controlled by writing to the
corresponding bit in this register
(except for P85)
0: “L” level
1: “H” level
NOTES:
1. Set the PACR register.
In 80-pin package, set bits PACR2, PACR1, PACR0 to 0112.
In 64-pin package, set bits PACR2, PACR1, PACR0 to 0102.
2. Nothing is assigned. If necessary, set to 0. When read, the content is 0.
Figure 19.7 P0 to P3 and P6 to P10 Registers
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RW
RW
RW
RW
RW
RW
RW
RW
19. Programmable I/O Ports
M16C/29 Group
Pull-up Control Register 0 (1)
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
PUR0
Bit Symbol
Address
03FC16
After Reset
0016
Bit Name
PU00
P00 to P03 pull-up
PU01
P04 to P07 pull-up
PU02
P10 to P13 pull-up
PU03
P14 to P17 pull-up
PU04
P20 to P23 pull-up
PU05
P24 to P27 pull-up
PU06
P30 to P33 pull-up
PU07
P34 to P37 pull-up
Function
0: Not pulled up
1: Pulled up (1)
RW
RW
RW
RW
RW
RW
RW
RW
RW
NOTE:
1. The pin for which this bit is 1 (pulled up) and the direction bit is 0 (input mode) is pulled up.
Pull-up Control Register 1
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
PUR1
Bit Symbol
Address
03FD16
After Reset
0016
Bit Name
Function
RW
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
(b3-b0)
PU14
P60 to P63 pull-up
PU15
P64 to P67 pull-up
PU16
P70 to P73 pull-up
PU17
P74 to P77 pull-up
0: Not pulled high
1: Pulled high (1)
RW
RW
RW
RW
NOTE:
1. The pin for which this bit is 1 (pulled up) and the direction bit is 0 (input mode) is pulled up.
Pull-up Control Register 2
b7
b6
b5
b4
b3
b2
b1
b0
Symbol
PUR2
Bit Symbol
Address
03FE16
Bit Name
PU20
P80 to P83 pull-up
PU21
P84 to P87 pull-up
PU22
P90 to P93 pull-up
PU23
PU24
P95 to P97 pull-up
P100 to P103 pull-up
PU25
P104 to P107 pull-up
(b7-b6)
After Reset
0016
Function
0: Not pulled up
1: Pulled up (1)
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
NOTE:
1. The pin for which this bit is 1 (pulled up) and the direction bit is 0 (input mode) is pulled up.
Figure 19.8 PUR0 to PUR2 Registers
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RW
RW
RW
RW
RW
RW
RW
M16C/29 Group
19. Programmable I/O Ports
Port Control Register
b7
b6
b5
b4
b3
b2
b1
b0
Symbpl
PCR
Address
03FF16
Bit symbol
PCR0
(b7-b1)
After Reset
0016
Bit Name
Port P1 control bit
Function
RW
Operation performed when the P1
register is read
0: When the port is set for input,
the input levels of P10 to P17
RW
pins are read. When set for
output, the port latch is read.
1: The port latch is read
regardless of whether the port
is set for input or output.
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
Figure 19.9 PCR Register
Pin Assignment Control Register (1)
b7
b6
b5
b4
b3
b2
b1
b0
Symbpl
PACR
Bit Symbol
PACR0
Address
025D16
Bit Name
Pin enabling bit
PACR1
PACR2
Reserved bits
Function
RW
010 : 64 pin
011 : 80 pin
All other values are reserved. Do
not use.
RW
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RW
Nothing is assigned. If necessary,
UART1 pin remapping bit
UART1 pins assigned to
0 : P67 to P64
1 : P73 to P70
NOTE:
1. Set the PACR register by the next instruction after setting the PRC2 bit in the PRCR register to 1 (write
enable).
Figure 19.10 PACR Register
RW
set to 0. When read, the
content is 0
(b6-b3)
U1MAP
After Reset
0016
RW
19. Programmable I/O Ports
M16C/29 Group
NMI Digital Debounce Register (1,2)
b7
b0
Symbol
NDDR
Address
033E16
After Reset
FF16
Function
If the set value =n,
- n = 0 to FE16; a signal with pulse width, greater than
(n+1)/f8, is input into NMI / SD
- n = FF16; the digital debounce filter is disabled and all
signals are input
Setting Range
RW
0016 to FF16
RW
NOTES:
1. Set the PACR register by the next instruction after setting the PRC2 bit in the PRCR register to 1 (write
enable).
2. When using the NMI interrupt to exit from stop mode, set the NDDR registert to FF16 before entering
stop mode.
P17 Digital Debounce Register(1)
b7
Symbol
P17DDR
b0
Address
033F16
After Reset
FF16
Function
If the set value =n,
- n = 0 to FE16; a signal with pulse width, greater than
(n+1)/f8, is input into INPC17/ INT5
- n = FF16; the digital debounce filter is disabled and all
signals are input
Setting Range RW
0016 to FF16
RW
NOTE:
1. When using the INT5 interrupt to exit from stop mode, set the P17DDR registert to FF16 before entering
stop mode.
Figure 19.11 NDDR and P17DDR Registers
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M16C/29 Group
• Example
19. Programmable I/O Ports
of INT5 Digital Debounce Function (if P17DDR = 0316)
Digital Debounce Filter
f8
P17
Data Bus
Clock
Port In
Signal Out
Reload Value
(write)
To INT5
Count Value
(read)
Data Bus
f8
Reload Value
FF
03
Port In
Signal Out
Count Value
03
FF
1
02
01
03
3
2
4
03
Reload Value
(continued)
02
01
FF
00
5
FF
Port In
(continued)
Signal Out
(continued)
Count Value
(continued)
03
FF
02
01
6
00
03
FF
7
8
FF
02
9
1. (Condition after reset). P17DDR=FF16. Pin input signal will be output directly.
2. Set the P17DDR register to 0316. The P17DDR register starts decrement along the f8 as a counter source, if the pin
input level (e.g.,"L") and the signal output level (e.g.,"H") are not matched.
3. The P17DDR register will stops counting when the pin input level and the signal output level are matched (e.g.,
both levels are "H") while counting.
4. If the pin input level (e.g.,"L") and the signal output level (e.g.,"H") are not matched the P17DDR register will start
decrement again after the setting value is reloaded.
5. When the P17DDR register is underflow, it stops counting and the signal output will output the same as pin input
level (e.g."L").
6. If the pin input level (e.g.,"H") and the signal output level (e.g., "L") are not matched again, the P17DDR register will
start decrement again after the setting value is reloaded.
7. When the P17DDR register is underflow, it stops counting and the signal output will output the same as pin input
level (e.g."H").
8. If the pin input level (e.g.,"H") and the signal output level (e.g., "L") are not matched again, the P17DDR register will
start decrement again after the setting value is reloaded.
9. Set the P17DDR register to FF16. The P17DDR register starts counting after the setting value is reloaded. Pin input
signal will be output directly.
Figure 19.12 Functioning of Digital Debounce Filter
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19. Programmable I/O Ports
M16C/29 Group
Table 19.1 Unassigned Pin Handling in Single-chip Mode
Pin Name
Setting
Ports P0 to P3, P6 to P10
Enter input mode and connect each pin to VSS via a resistor (pull-down);
or enter output mode and leave the pins open (1,2,4)
XOUT
Leave pin open (3)
XIN
Connect pin to VCC via a resistor (pull-up) (5)
AVCC
Connect pin to VCC
AVSS, VREF
Connect pin to VSS
NOTES:
1. If the port enters output mode and is left open, it is in input mode before output mode is entered by program
after reset. While the port is in input mode, voltage level on the pins is indeterminate and power consumption
may increase. Direction register setting may be changed by noise or failure caused by noise. Configure
direction register settings regulary to increase the reliability of the program.
2. Use the shortest possible wiring to connect the MCU pins to unassigned pins (within 2 cm).
3. When the external clock is applied to the XIN pin, set the pin as written above.
4. In the 64-pin package, set bits PACR2, PACR1, and PACR0 in the PACR register to 0102. In the 80-pin
package, set bits PACR2, PACR1, and PACR0 to 0112.
5. When the main clock oscillation is not used, set the CM05 bit in the CM0 register to 1 (main clock stops) to
reduce power consumption.
MCU
Port P0 to P3, P6 to P10
(1)
(Input mode)
·
·
·
(Input mode)
(Output mode)
·
·
·
Open
XIN
XOUT
Open
VCC
AV CC
AVSS
Vref
VSS
In single-chip mode
NOTE:
1. When using the 64-pin package, set bits PACR2, PACR1, and PACR0 to 0102.
When using the 80-pin package, set bits PACR2, PACR1, and PACR0 to 0112.
Figure 19.13 Unassigned Pin Handling
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20. Flash Memory Version
M16C/29 Group
20. Flash Memory Version
20.1 Flash Memory Performance
In the flash memory version, rewrite operation to the flash memory can be performed in four modes: CPU
rewrite mode, standard serial I/O mode, parallel I/O mode, and CAN I/O mode.
Table 20.1 lists specifications of the flash memory version. (Refer to Table 1.1 or Table 1.2 for the items
not listed in Table 20.1.
Table 20.1 Flash Memory Version Specifications
Item
Specification
Flash memory operating mode
4 modes (CPU rewrite, standard serial I/O, parallel I/O, CAN I/O)(3)
Erase block
See Figures 20.1 to 20.3 Flash Memory Block Diagram
Program method
In units of word
Erase method
Block erase
Program, erase control method
Program and erase controlled by software command
Protect method
Blocks 0 to 5 are write protected by FMR16 bit.
In addition, the block 0 and block 1 are write protected by FMR02 bit
Number of commands
5 commands
Program/Erase
Endurance(1)
100 times 1,000 times (See Tables 1.6 to 1.8)
100 times 10,000 times (See Tables 1.6 to 1.8)
Block 0 to 5 (program area)
Block A and B (data are) (2)
Data Retention
20 years (Topr = 55ϒC)
ROM code protection
Parallel I/O, standard serial I/O, and CAN I/O modes are supported.
NOTES:
1. Program and erase endurance definition
Program and erase endurance are the erase endurance of each block. If the program and erase endurance are n
times (n=100,1000,10000), each block can be erased n times. For example, if a 2-Kbyte block A is erased after
writing 1 word data 1024 times, each to different addresses, this is counted as one program and erasure.
However, data cannot be written to the same address more than once without erasing the block. (Rewrite
disabled)
2. To use the limited number of erasure efficiently, write to unused address within the block instead of rewrite. Erase
block only after all possible address are used. For example, an 8-word program can be written 128 times before
erase is necessary. Maintaining an equal number of erasure between Block A and B will also improve efficiency.
We recommend keeping track of the number of times erasure is used.
3. The M16C/29 Group, T-ver./V-ver. does not support the CAN I/O mode.
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20. Flash Memory Version
M16C/29 Group
Table 20.2. Flash Memory Rewrite Modes Overview
Flash memory
rewrite mode
Function
Areas which
can be rewritten
Operation
mode
ROM
programmer
CPU rewrite mode
Standard serial I/O
mode
The user ROM area is
The user ROM area
rewritten when the CPU is rewritten using a
excutes software
dedicated serial
command
programmer.
from the CPU.
Standard serial I/O
EW0 mode:
mode 1:
Rewrite in area other
Clock synchronous
than flash memory
serial I/O
EW1 mode:
Standard serial I/O
Rewrite in flash
mode 2:
memory
UART
User ROM area
User ROM area
Parallel I/O mode
CAN I/O mode
The user ROM areas
are rewritten using a
dedicated parallel
programmer.
The user ROM areas is
rewritten using a
dedicated CAN programmer.
User ROM area
User ROM area
Single chip mode
Boot mode
Parallel I/O mode
Boot mode
None
Serial programmer
Parallel programmer
CAN programmer
20.1.1 Boot Mode
The MCU enters boot mode when a hardware reset is performed while a high-level ("H") signal is applied
to pins CNVSS and P86 or while an "H" signal is applied to pins CNVSS and P16 and a low-level ("L")
signal is applied to the P85. A program in the boot ROM area is executed.
The boot ROM area is reserved. The boot ROM area stores the rewrite control program for a standard
serial I/O mode before shipping. Do not rewrite the boot ROM area.
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20. Flash Memory Version
M16C/29 Group
20.2 Memory Map
The flash memory contains the user ROM area and the boot ROM area (reserved area). Figures 20.1 to
20.3 show a block diagram of the flash memory. The user ROM area has space to store the MCU operation
program in single-chip mode and two 2-Kbyte spaces: the block A and B.
The user ROM area is divided into several blocks. The user ROM area can be rewritten in CPU rewrite,
standard serial I/O, parallel I/O, or CAN I/O mode.
However, to rewrite program in block 0 and 1 in CPU rewrite mode, set the FMR02 bit in the FMR0 register
to 1 (block 0, 1 rewrite enabled) and the FMR16 bit in the FMR1 register to 1 (blocks 0 to 5 rewrite enabled).
Also, to rewrite program in blocks 2 to 5 in CPU rewrite mode, set the FMR16 bit in the FMR1 register to 1
(blocks 0 to 5 rewrite enabled). When the PM10 bit in the PM1 register is set to 1 (data space access
enabled), blocks A and B can be available for use.
(Data space)
00F00016
00F7FF16
00F80016
00FFFF16
Block B :2K bytes(2)
Block A :2K bytes (2)
(Program space)
0F000016
Block 3 : 32K bytes (5)
0F7FFF16
0F800016
Block 2 : 16K bytes
Block 2 : 16K bytes (5)
0FBFFF16
0FC00016
NOTES:
1. To specify a block, use the maximum even address in the block.
2. Blocks A and B are enabled to use when the PM10 bit in the PM1
register is set to 1.
3. Blocks 0 and 1 are enabled for programs and erases when the
FMR02 bit in the FMR0 register is set to 1 and the FMR16 bit in
the FMR1 register is set to 1. (CPU rewrite mode only)
4. The boot ROM area is reserved. Do not access.
5. Blocks 2 and 3 are enabled for programs and erases when the
FMR16 bit in the FMR1 register is set to 1. (CPU rewrite mode
only)
Block 1 : 8K bytes (3)
0FDFFF16
0FE00016
Block 0 : 8K bytes (3)
0FFFFF16
0FF00016
4K bytes(4)
0FFFFF16
User ROM area
Boot ROM area
Figure 20.1 Flash Memory Block Diagram (ROM capacity 64 Kbytes)
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20. Flash Memory Version
M16C/29 Group
00F00016
00F7FF16
00F80016
00FFFF16
(Data space)
Block B :2K bytes (2)
Block A :2K bytes (2)
(Program space)
0E800016
Block 4 : 32K bytes (5)
0EFFFF16
0F000016
Block 3 : 32K bytes (5)
0F7FFF16
0F800016
Block 2 : 16K bytes
Block 2 : 16K bytes (5)
0FBFFF16
0FC00016
NOTES:
1. To specify a block, use the maximum even address in the block.
2. Blocks A and B are enabled for use when the PM10 bit in the PM1
register is set to 1.
3. Blocks 0 and 1 are enabled for programs and erasure when the
FMR02 bit in the FMR0 register is set to 1 and the FMR16 bit in the
FMR1 register is set to 1. (CPU rewrite mode only)
4. The Boot ROM area is reserved. Do not rewrite.
5. Blocks 2 to 4 are enabled for programs and erasure when the
FMR16 bit in the FMR1 register is set to 1. (CPU rewrite mode
only)
Block 1 : 8K bytes (3)
0FDFFF16
0FE00016
Block 0 : 8K bytes (3)
0FFFFF16
0FF00016
0FFFFF16
User ROM area
4K bytes (4)
Boot ROM area
Figure 20.2 Flash Memory Block Diagram (ROM capacity 96 Kbytes)
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20. Flash Memory Version
M16C/29 Group
00F00016
00F7FF16
00F80016
00FFFF16
(Data space)
Block B :2K bytes(2)
Block A :2K bytes(2)
(Program space)
0E000016
Block 5 : 32K bytes(5)
0E7FFF16
0E800016
Block 4 : 32K bytes (5)
0EFFFF16
0F000016
Block 3 : 32K bytes (5)
0F7FFF16
0F800016
Block 2 : 16K bytes
Block 2 : 16K bytes (5)
0FBFFF16
0FC00016
Block 1 : 8K bytes(3)
0FDFFF16
0FE00016
Block 0 : 8K bytes (3)
0FFFFF16
NOTES:
1. To specify a block, use the maximum even address
in the block.
2. Blocks A and B are enabled to use when the PM10
bit in the PM1 register is set to 1.
3. Blocks 0 and 1 are enabled for programs and
erases when the FMR02 bit in the FMR0 register is
set to 1 and the FMR16 bit in the FMR1 register is
set to 1. (CPU rewrite mode only)
4. The boot ROM area is reserved. Do not access.
5. Blocks 2 to 5 are enabled for programs and erases
when the FMR16 bit in the FMR1 register is set to
1. (CPU rewrite mode only)
0FF00016
0FFFFF16
User ROM area
4K bytes (Note 4)
Boot ROM area
Figure 20.3 Flash Memory Block Diagram (ROM capacity 128 Kbytes)
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20. Flash Memory Version
M16C/29 Group
20.3 Functions To Prevent Flash Memory from Rewriting
The flash memory has a built-in ROM code protect function for parallel I/O mode and a built-in ID code
check function for standard input/output mode to prevent the flash memory from reading or rewriting.
20.3.1 ROM Code Protect Function
The ROM code protect function disables reading or changing the contents of the on-chip flash memory in
parallel I/O mode. Figure 20.4 shows the ROMCP address. The ROMCP address is located in a user
ROM area. To enable ROM code protect, set the ROMCP1 bit to “002”, “012”, or “102” and set the bit 5 to
bit 0 to “1111112”.
To cancel ROM code protect, erase the block including the the ROMCP register in CPU rewrite mode or
standard serial I/O mode.
20.3.2 ID Code Check Function
Use the ID code check function in standard serial input/output mode. Unless the flash memory is blank,
the ID code sent from the programmer and the 7-byte ID code written in the flash memory are compared
for match. If the ID codes do not match, the commands sent from the programmer are not acknowledged.
The ID code consists of 8-bit data, starting with the first byte, into addresses, 0FFFDF16, 0FFFE316,
0FFFEB16, 0FFFEF16, 0FFFF316, 0FFFF716, and 0FFFFB16. The flash memory must have a program
with the ID code set in these addresses.
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20. Flash Memory Version
M16C/29 Group
ROM Code Protect Control Address(5)
b7
b6
b5
b4
b3
b2
b1
b0
1
1
1
1
Symbol
ROMCP
Address
0FFFFF16
Bit Name
Bit Symbol
(b5-b0)
ROMCP1
Factory Setting
FF16 (4)
Function
Reserved Bit
Set to 1
ROM Code Protect Level
1 Set Bit (1, 2, 3, 4)
b7 b6
00:
01: Enables protect
10:
11: Disables protect
}
RW
RW
RW
RW
NOTES:
1. When the ROM code protect is active by the ROMCP1 bit setting, the flash memory is protected
against reading or rewriting in parallel I/O mode.
2. Set the bit 5 to bit 0 to 1111112 when the ROMCP1 bit is set to a value other than 112. When the bit 5
to bit 0 are set to values other than 1111112, the ROM code protection may not become active by
setting the ROMCP1 bit to a value other than 112.
3. To make the ROM code protection inactive, erase a block including the ROMCP address in standard
serial I/O mode or CPU rewrite mode.
4. The ROMCP address is set to FF16 when a block, including the ROMCP address, is erased.
5. When a value of the ROMCP address is 0016 or FF16, the ROM code protect function is disabled.
Figure 20.4 ROMCP Address
Address
0FFFDF16 to 0FFFDC16 ID1
0FFFE316 to 0FFFE016
ID2
0FFFE716 to 0FFFE416
0FFFEB16 to 0FFFE816
Undefined instruction vector
Overflow vector
BRK instruction vector
ID3
0FFFEF16 to 0FFFEC16 ID4
Address match vector
Single step vector
0FFFF316 to 0FFFF016
ID5
Watchdog timer vector
0FFFF716 to 0FFFF416
ID6
DBC vector
0FFFFB16 to 0FFFF816
ID7
NMI vector
0FFFFF16 to 0FFFFC16
ROMCP Reset vector
4 bytes
Figure 20.5 Address for ID Code Stored
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20. Flash Memory Version
M16C/29 Group
20.4 CPU Rewrite Mode
In CPU rewrite mode, the user ROM area can be rewritten when the CPU executes software commands.
The user ROM area can be rewritten with MCU mounted on a board without using the ROM writer. The
program and block erase commands are executed only in the user ROM area.
When the interrupt requests are generated during the erase operation in CPU rewirte mode, the flash
memory offers an erase suspend function to suspend the erase operation and process the interrupt operation. During the erase suspend function is operated, the user ROM area can be read by program.
Erase-write(EW) 0 mode and erase-write 1 mode are provided as CPU rewrite mode. Table 20.3 lists
differences between EW mode 0 and EW mode 1. One wait is required for the CPU erase-write control.
Table 20.3 EW Mode 0 and EW Mode 1
Item
EW mode 0
Operation mode
Single chip mode
Areas in which a
User ROM area
rewrite control
program can be located
Areas where
The rewrite control program must be
rewrite control
transferred to any other than the flash
program can be
memory (e.g., RAM) before being
executed(2)
executed
Areas which can be
User ROM area
rewritten
Software command
Restrictions
None
Mode after programming Read Status Register Mode
or erasing
CPU state during autoOperating
write and auto-erase
Flash memory status
• Read the FMR00, FMR06, and
detection
FMR07 bits in the FMR0 register
by program
• Execute the read status register
command to read bits SR7, SR5,
and SR4.
Condition for transferring
Set bits FMR40 and FMR41 in
to erase-suspend(3)
the FMR4 register to 1 by program.
NOTES:
EW mode 1
Single chip mode
User ROM area
The rewrite control program can be
excuted in the user ROM area
User ROM area
However, this excludes blocks with the
rewrite control program
• Program, block erase command
Cannot be executed in a block having
the rewite control program
• Read Status Register command
Cannot be executed
Read Array mode
In a hold state (I/O ports retain the state
before the command is excuted(1)
Read the FMR00, FMR06, and FMR07
bits in the FMR0 registerby program
The FMR40 bit in the FMR4 register is
set to 1 and the interruput request of
an acknowledged interrupt is generated
1. Do not generate a DMA transfer.
2. Block 1 and Block 0 are enabled for rewrite by setting FMR02 bit in the FMR0 register to 1 and setting
FMR16 bit in the FMR1 register to 1. Block 2 to Block 5 are enabled for rewrite by setting FMR16 bit
in the FMR1 register to 1.
3. The time, until entering erase suspend and reading flash is enabled, is maximum td(SR-ES) after
satisfying the conditions.
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20. Flash Memory Version
M16C/29 Group
20.4.1 EW Mode 0
The MCU enters CPU rewrite mode by setting the FMR01 bit in the FMR0 register to 1 (CPU rewrite mode
enabled) and is ready to accept software commands. EW mode 0 is selected by setting the FMR11 bit in
the FMR1 register to 0.
To set the FMR01 bit to 1, set to 1 after first writing 0. The software commands control programming and
erasing. The FMR0 register or the status register indicates whether a programming or erasing operations
is completed.
When entering the erase-suspend during the auto-erasing, set the FMR40 bit to 1 (erase-suspend enabled) and the FMR41 bit to 1 (suspend request). After waiting for td(SR-ES) and verifying the FMR46 bit
is set to 1 (auto-erase stop), access to the user ROM area. When setting the FMR41 bit to 0 (erase
restart), auto-erasing is restarted.
20.4.2 EW Mode 1
EW mode 1 is selected by setting the FMR11 bit to 1 after the FMR01 bit is set to 1 (set to 1 after first
writing 0).
The FMR0 register indicates whether or not a programming or an erasing operation is completed. Read
status register cannot be read in EW mode 1.
When an erase/program command is initiated, the CPU halts all program execution until the command
operation is completed or erase-suspend request is generated.
When enabling an erase-suspend function, set the FMR40 bit to 1 (erase suspend enabled) and execute
block erase commands. Also, the interrupt to transfer to erase-suspend must be set enabled preliminarily. When entering erase-suspend after td(SR-ES) from an interrupt is requested, interrupts can be accepted.
When an interrupt request is generated, the FMR41 bit is automatically set to 1 (suspend request) and an
auto-erasing is suspended. If an auto-erasing has not completed (when the FMR00 bit is 0) after an
interrupt process is completed, set the FMR41 bit to 0 (erase restart) and execute block erase commands
again.
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20.5 Register Description
Figure 20.6 shows the flash memory control register 0 and flash memory control register 1. Figure 20.7
shows the flash memory control register 4.
20.5.1 Flash Memory Control Register 0 (FMR0)
•FMR 00 Bit
The FMR00 bit indicates the operating state of the flash memory. Its value is 0 while the program,
erase, or erase-suspend command is being executed, otherwise, it is 1.
•FMR01 Bit
The MCU can accept commands when the FMR01 bit is set to 1 (CPU rewrite mode). To set the
FMR01 bit to 1, first set it to 0 and then 1. The FMR01 bit is set to 0 only by writing 0.
•FMR02 Bit
The combined settings of bits FMR02 and FMR16 enable program and erase in the user ROM area.
See Table 20.4 for setting details. To set the FMR02 bit to 1, first set it to 0 and then 1. The FMR02
bit is valid only when the FMR01 bit is set to 1 (CPU rewrite mode enable).
•FMSTP Bit
The FMSTP bit initializes the flash memory control circuits and minimizes power consumption in the
flash memory. Access to the on-chip flash memory is disabled when the FMSTP bit is set to 1. Set the
FMSTP bit by program in a space other than the flash memory.
Set the FMSTP bit to 1 if one of the following occurs:
•A flash memory access error occurs during erasing or programming in EW mode 0 (FMR00 bit does
not switch back to 1 (ready)).
•Low-power consumption mode or on-chip oscillator low-power consumption mode is entered.
Figure 20.10 shows a flow chart illustrating how to start and stop the flash memory before and after
entering low power mode. Follow the procedure in this flow chart.
When entering stop or wait mode while the CPU rewrite mode is disabled, do not set the FMR0
register because the on-chip flash memory is automatically turned off and turned back on when
exiting.
•FMR06 Bit
The FMR06 bit is a read-only bit indicating an auto-program operation state. The FMR06 bit is set to
1 when a program error occurs; otherwise, it is set to 0. For details, refer to 20.8.4 Full Status Check.
•FMR07 Bit
The FMR07 bit is a read-only bit indicating an auto-erase operation status. The FMR07 bit is set to 1
when an erase error occurs; otherwise, it is set to 0. For details, refer to 20.8.4 Full Status Check.
Figure 20.8 shows a EW mode 0 set/reset flowchart, Figure 20.9 shows a EW mode 1 set/reset flowchart.
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20.5.2 Flash Memory Control Register 1 (FMR1)
•FMR11 Bit
EW mode 1 is entered by setting the FMR11 bit to 1 (EW mode 1). The FMR11 bit is valid only when
the FMR01 bit is set to 1.
•FMR16 Bit
The combined setting of bits FMR02 and FMR16 enables program and erase in the user ROM area.
To set the FMR16 bit to 1, first set it to 0 and then 1. The FMR16 bit is valid only when the FMR01 bit
is set to 1 (CPU rewrite mode enable).
•FMR17 Bit
If the FMR17 bit is set to 1 (with wait state), 1 wait state is inserted when blocks A and B are accessed,
regardless of the content of the PM17 bit in the PM1 register. The PM17 bit setting is reflected to
access other blocks and internal RAM, regardless of the FMR17 bit setting.
Set the FMR17 bit to 1 (with wait state) to rewrite more than 100 times (U7, U9).
Table 20.4 Protection using FMR16 and FMR02
FMR16
FMR02 Block A, Block B
Block 0, Block 1
0
0
write enabled
write disabled
0
1
write enabled
write disabled
1
0
write enabled
write disabled
1
1
write enabled
write enabled
other user block
write disabled
write disabled
write enabled
write enabled
20.5.3 Flash Memory Control Register 4 (FMR4)
•FMR40 Bit
The erase-suspend function is enabled when the FMR40 bit is set to 1 (enabled).
•FMR41 Bit
When the FMR41 bit is set to 1 by program during auto-erasing in EW mode 0, erase-suspend mode
is entered. In EW mode 1, the FMR41 bit is automatically set to 1 (suspend request) to enter erasesuspend mode when an enabled interrupt request is generated. Set the FMR41 bit to 0 (erase restart)
to restart an auto-erasing operation.
•FMR46 Bit
The FMR46 bit is set to 0 during auto-erasing. It is set to 1 in erase-suspend mode.
Do not access to flash memory when the FMR46 bit is set to 0.
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Flash Memory Control Register 0
b7 b6 b5 b4 b3 b2 b1 b0
0 0
Symbol
Address
FMR0
After Reset
01B7 16
00000001 2
Bit Name
Bit Symbol
Function
FMR00
RY/BY status flag
0: Busy (during writing or erasing)
1: Ready
FMR01
CPU rewrite mode select bit (1)
0: Disables CPU rewrite mode
(Disables software command)
1: Enables CPU rewrite mode
(Enables software commands)
FMR02
Block 0, 1 rewrite enable bit
Set write protection for user ROM area
(see Table 20.4)
FMSTP
Flash memory stop bit
(b5-b4)
Reserved bit
FMR06
Program status flag
FMR07
Erase status flag
(2)
(3, 5)
0: Starts flash memory operation
1: Stops flash memory operation
(Enters low-power consumption state
and flash memory reset)
RW
RO
RW
RW
RW
Set to 0
RW
(4)
0: Successfully completed
1: Completion error
RO
(4)
0: Successfully completed
1: Completion error
RO
NOTES:
1. Set the FMR01 bit to 1 immediately after setting it first to 0. Do not generate an interrupt or a DMA
transfer between setting the bit to 0 and setting it to 1. Set this bit while the P85/NMI/SD pin is held “H”
when selecting the NMI function. Set by program in a space other than the flash memory in EW mode
0. Set this bit to read alley mode and 0.
2. Set this bit to 1 immediately after setting it first to 0 while the FMR01 bit is set to 1. Do not generate an
interrupt or a DMA transfer between setting this bit to 0 and setting it to 1.
3. Set this bit in a space other than the flash memory by program. When this bit is set to 1, access to
flash memory will be denied. To set this bit to 0 after setting it to 1, wait for 10 usec. or more after
setting it to 1. To read data from flash memory after setting this bit to 0, maintain tps wait time before
accessing flash memory.
4. This bit is set to 0 by executing the clear status command.
5. This bit is enabled when the FMR01 bit is set to 1 (CPU rewrite mode). If the FMR01 bit is set to 0, this
bit can be set to 1 by writing 1 to the FMR01 bit. However, the flash memory does not enter low-power
consumption status and it is not initialized.
Flash Memory Control Register 1
b7 b6 b5 b4 b3 b2 b1 b0
0
Symbol
FMR1
000XXX0X 2
Function
Reserved bit
FMR11
EW mode 1 select bit
(b3-b2)
Reserved bit
(b4)
After Reset
01B5 16
Bit Name
Bit Symbol
(b0)
Address
(1)
RW
When read, the content is undefined
RO
0: EW mode 0
1: EW mode 1
RW
When read, the content is undefined
RO
Nothing is assigned. If necessary, set to 0.
When read, the content is undefined
Reserved bit
Set to 0
RW
FMR16
Block 0 to 5 rewrite enable
bit (2)
Set write protection for user ROM
space (see Table 20.4)
0: Disable
1: Enable
RW
FMR17
Block A, B access wait bit
0: PM17 enabled
1: With wait state (1 wait)
RW
(b5)
(3)
NOTES:
1. Set the FMR11 bit to 1 immediately after setting it first to 0 while the FMR01 bit is set to 1. Do not
generate an interrupt or a DMA transfer between setting the bit to 0 and setting it to 1. Set this bit while
the P85/NMI/SD pin is held "H" when the NMI function is selected. If the FMR01 bit is set to 0, the FMR01
bit and FMR11 bit are both set to 0.
2. Set this bit to 1 immediately after setting it first to 0 while the FMR01 bit is set to 1. Do not generate an
interrupt or a DMA transfer between setting this bit to 0 and setting it to 1.
3. When rewriting more than 100 times, set this bit to 1 (with wait state). When the FMR17 bit is set to1(with
wait state), regardless of the PM17 bit setting, 1 wait state is inserted when accessing to blocks A and B.
The PM17 bit setting is enabled, regardless of the FMR17 bit setting, as to the access to other block and
the internal RAM.
Figure 20.6 FMR0 and FMR1 Registers
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Flash Memory Control Register 4
b7 b6 b5 b4 b3 b2 b1 b0
0
0 0 0 0
Symbol
Address
After Reset
FMR4
01B3 16
01000000 2
Bit Symbol
Bit Name
Function
FMR40
Erase suspend function
enable bit (1)
0: Disabled
1: Enabled
RW
FMR41
Erase suspend
request bit (2)
0: Erase restart
1: Suspend request
RW
(b5-b2)
Reserved bit
Set to 0
RO
FMR46
Erase status
0: During auto-erase operation
1: Auto-erase stop
(erase suspend mode)
RO
(b7)
Reserved bit
Set to 0
RW
RW
NOTES:
1. Set the FMR40 bit to 1 immediately after setting it first to 0. Do not generate any interrupt or DMA
transfer between setting the bit to 0 and setting it to 1. Set by program in space other than the flash
memory in EW mode 0.
2. The FMR41 bit is valid only when the FMR40 bit is set to 1. The FMR41 bit can be written only
between executing an erase command and completing erase (this bit is set to 0 other than the
above duration). The FMR41 bit can be set to 0 or 1 by program in EW mode 0. In EW mode 1, the
FMR41 bit is automatically set to 1 when the FMR40 bit is 1 and a maskable interrupt is generated
during erasing. The FMR41 bit cannot be set to 1 by program (it can be set to 0 by program).
Figure 20.7 FMR4 Register
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EW mode 0 operation procedure
Rewrite control program
Single-chip mode
Set the FMR01 bit to 1 after writing 0 (CPU
rewrite mode enabled) (2)
Set CM0, CM1, and PM1 registers
Execute software commands
(1)
Transfer a rewrite control program to internal RAM
area
Execute the Read Array command (3)
Write 0 to the FMR01 bit
(CPU rewrite mode disabled)
Jump to the rewrite control program transfered to an
internal RAM area (in the following steps, use the
rewrite control program internal RAM area)
Jump to a specified address in the flash memory
NOTES:
1. Select 10 MHz or below for CPU clock using the CM06 bit in the CM0 register and bits CM17 to 16 in the CM1
register. Also, set the PM17 bit in the PM1 register to 1 (with wait state).
2. Set the FMR01 bit to 1 immediately after setting it to 0. Do not generate an interrupt or a DMA transfer
between setting the bit to 0 and setting it to 1. Set the FMR01 bit in a space other than the internal flash
memory. Also, set only when the P85/NMI/SD pin is “H” at the time of the NMI function selected.
3. Disables the CPU rewrite mode after executing the read array command.
Figure 20.8 Setting and Resetting of EW Mode 0
EW mode 1 operation procedure
Program in ROM
Single-chip mode
Set CM0, CM1, and PM1 registers (1)
Set the FMR01 bit to 1 (CPU rewrite mode
enabled) after writing 0
Set the FMR11 bit to 1 (EW mode 1) after writing
0 (2, 3)
Execute software commands
Set the FMR01 bit to 0
(CPU rewrite mode disabled)
NOTES:
1. Select 10 MHz or below for CPU clock using the CM06 bit in the CM0 register and bits CM17 to 16
in the CM1 register. Also, set the PM17 bit in the PM1 register to 1 (with wait state).
2. Set the FMR01 bits to 1 immediately after setting it to 0. Do not generate an interrupt or a DMA
transfer between setting the bit to 0 and setting the bit to 1. Set the FMR01 bit in a space other than
the internal flash memory. Set only when the P85/NMI/SD pin is “H” at the time of the NMI function
selected.
3. Set the FMR11 bit to 1 immediately after setting it to 0 while the FMR01 bit is set to 1. Do not
generate an interrupt or a DMA transfer between setting the FMR11 bit to 0 and setting it to 1.
Figure 20.9 Setting and Resetting of EW Mode 1
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Low power consumption
mode program
Transfer a low power internal consumption mode
program to RAM area
Jump to the low power consumption mode
program transferred to internal RAM area.
(In the following steps, use the low-power
consumption mode program or internal RAM area)
Set the FMR01 bit to 1 after setting 0 (CPU
rewrite mode enabled) (2)
Set the FMSTP bit to 1 (flash memory stopped.
Low power consumption state)(1)
Switch the clock source of CPU clock.
Turn main clock off (2)
Process of low power consumption mode or
on-chip oscillator low power consumption mode
Start main clock
wait until oscillation stabilizes
oscillation
switch the clock source of the CPU clock (2)
Set the FMSTP bit to 0 (flash memory operation)
Set the FMR01 bit to 0
(CPU rewrite mode disabled)
Wait until the flash memory circuit stabilizes (tps) (3)
Jump to a desired address in the flash memory
NOTES:
1. Set the FMRSTP bit to 1 after setting the FMR01 bit to 1 (CPU rewrite mode).
2. Wait until the clock stabilizes to switch the clock source of the CPU clock to the main clock or the sub clock.
3. Add a tps wait time by a program. Do not access the flash memory during this wait time.
Figure 20.10 Processing Before and After Low Power Dissipation Mode
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20.6 Precautions in CPU Rewrite Mode
Described below are the precautions to be observed when rewriting the flash memory in CPU rewrite mode.
20.6.1 Operation Speed
When the CPU clock source is the main clock, set the CPU clock frequency at 10 MHz or less with the
CM06 bit in the CM0 register and bits CM17 and CM16 in the CM1 register, before entering CPU rewrite
mode (EW mode 0 or EW mode 1). Also, when selecting f3(ROC) of a on-chip oscillator as a CPU clock
source, set bits ROCR3 and ROCR2 in the ROCR register to the CPU clock division rate at “divide-by-4”
or “divide-by-8”, before entering CPU rewrite mode (EW mode 0 or EW mode 1).
In both cases, set the PM17 bit in the PM1 register to 1 (with wait state).
20.6.2 Prohibited Instructions
The following instructions cannot be used in EW mode 0 because the CPU tries to read data in the flash
memory: UND instruction, INTO instruction, JMPS instruction, JSRS instruction, and BRK instruction
20.6.3 Interrupts
EW Mode 0
• To use interrupts having vectors in a relocatable vector table, the vectors must be relocated to the
RAM area.
_______
• The NMI and watchdog timer interrupts are available since registers FMR0 and FMR1 are forcibly
reset when either interrupt occurs. However, the interrupt program, which allocates the jump
addresses for each interrupt routine to the fixed vector table, is needed. Flash memory rewrite
_______
operation is aborted when the NMI or watchdog timer interrupt occurs. Set the FMR01 bit to 1 and
execute the rewrite and erase program again after exiting the interrupt routine.
• The address match interrupt can not be used since the CPU tries to read data in the flash memory.
EW Mode 1
• Do not acknowledge any interrupts with vectors in the relocatable vector table or the address
match interrupt during the auto program period or auto erase period with erase-suspend function
disabled.
20.6.4 How to Access
To set bit FMR01, FMR02, FMR11 or FMR16 to 1, write 1 immediately after setting to 0. Do not generate
an interrupt or a DMA transfer between the instruction to set the bit to 0 and the instruction to set it to 1.
_______
_______ _____
When the NMI function is selected, set the bit while an “H” signal is applied to the P85/NMI/SD pin.
20.6.5 Writing in the User ROM Area
20.6.5.1 EW Mode 0
• If the supply voltage drops while rewriting the block where the rewrite control program is stored,
the flash memory can not be rewritten, because the rewrite control program is not correctly rewritten. If this error occurs, rewrite the user ROM area in standard serial I/O mode or parallel I/O
mode.
20.6.5.2 EW Mode 1
• Do not rewrite the block where the rewrite control program is stored.
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20.6.6 DMA Transfer
In EW mode 1, do not generate a DMA transfer while the FMR00 bit in the FMR0 register is set to 0.
(during the auto-programming or auto-erasing).
20.6.7 Writing Command and Data
Write the command codes and data to even addresses in the user ROM area.
20.6.8 Wait Mode
When entering wait mode, set the FMR01 bit to 0 (CPU rewrite mode disabled) before executing the
WAIT instruction.
20.6.9 Stop Mode
When entering stop mode, the following settings are required:
• Set the FMR01 bit to 0 (CPU rewrite mode disabled) and disable the DMA transfer before setting the
CM10 bit to 1 (stop mode).
20.6.10 Low Power Consumption Mode and On-Chip Oscillator-Low Power Consumption Mode
If the CM05 bit is set to 1 (main clock stopped), do not execute the following commands.
• Program
• Block erase
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20.7 Software Commands
Read or write 16-bit commands and data from or to even addresses in the user ROM area. When writing a
command code, 8 high-order bits (D15–D8) are ignored.
Table 20.5 Software Commands
First bus cycle
Command
Second bus cycle
Mode
Address
Data
(D15 to D0)
Mode
Address
Data
(D15 to D0)
Read array
Write
X
xxFF16
Read status register
Write
X
xx7016
Read
X
SRD
Clear status register
Write
X
xx5016
Program
Write
WA
xx4016
Write
WA
WD
Block erase
Write
X
xx2016
Write
BA
xxD016
SRD: Status register data (D7 to D0)
WA : Write address (However,even address)
WD : Write data (16 bits)
BA : Highest-order block address (However,even address)
X : Any even address in the user ROM area
xx : 8 high-order bits of command code (ignored)
20.7.1 Read Array Command (FF16)
The read array command reads the flash memory.
Read array mode is entered by writing command code xxFF16 in the first bus cycle. Content of a specified address can be read in 16-bit unit after the next bus cycle. The MCU remains in read array mode until
an another command is written. Therefore, contents of multiple addresses can be read consecutively.
20.7.2 Read Status Register Command (7016)
The read status register command reads the status register.
By writing command code xx7016 in the first bus cycle, the status register can be read in the second bus
cycle (Refer to 20.8 Status Register). Read an even address in the user ROM area. Do not execute this
command in EW mode 1.
20.7.3 Clear Status Register Command (5016)
The clear status register command clears the status register to 0.
By writing xx5016 in the first bus cycle, and bits FMR06 to FMR07 in the FMR0 register and bits SR4 to
SR5 in the status register are set to 0.
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20.7.4 Program Command (4016)
The program command writes 2-byte data to the flash memory.
Auto program operation (data program and verify) start by writing xx4016 in the first bus cycle and data to
the write address specified in the second bus cycle. The address value specified in the first bus cycle
must be the same even address as the write address secified in the second bus cycle.
The FMR00 bit in the FMR0 register indicates whether an auto-programming operation has been completed. The FMR00 bit is set to 0 during the auto-program and 1 when the auto-program operation is
completed.
After the completion of auto-program operation, the FMR06 bit in the FMR0 register indicates whether or
not the auto-program operation has been successfully completed. (Refer to 20.8.4 Full Status Check).
Also, each block can disable programming command (Refer to Table 20.4).
An address that is already written cannot be altered or rewritten.
When commands other than the program command are executed immediately after executing the program command, set the same address as the write address specified in the second bus cycle of the
program command, to the specified address value in the first bus cycle of the following command.
In EW mode 1, do not execute this command on the blocks where the rewrite control program is allocated.
In EW mode 0, the MCU enters read status register mode as soon as the auto-program operation starts
and the status register can be read. The SR7 bit in the status register is set to 0 as soon as the autoprogram operation starts. This bit is set to 1 when the auto-program operation is completed. The MCU
remains in read status register mode until the read array command is written. After completion of the
auto-program operation, the status register indicates whether or not the auto-program operation has
been successfully completed.
Start
Write command code xx4016 to the
(1)
write address
Write data to the write address(1)
NO
FMR00=1?
YES
Full status check
(2)
Program completed
NOTES:
1. Write the command code and data at even address.
2. Refer to Figure 20.14.
Figure 20.11 Flow Chart of Program Command
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20.7.5 Block Erase
Auto erase operation (erase and verify) start in the specified block by writing xx2016 in the first bus cycle
and xxD016 to the highest-order even addresse of a block in the second bus cycle.
The FMR00 bit in the FMR0 register indicates whether the auto-erase operation has been completed.
The FMR00 bit is set to 0 (busy) during the auto-erase and 1 (ready) when the auto-erase operation is
completed.
When using the erase-suspend function in EW mode 0, verify whether a flash memory has entered erase
suspend mode, by the FMR46 bit in the FMR4 register. The FMR46 bit is set to 0 during auto-erase
operation and 1 when the auto-erase operation is completed (entering erase-suspend).
After the completion of an auto-erase operation, the FMR07 bit in the FMR0 register indicates whether or
not the auto-erase operation has been successfully completed. (Refer to 20.8.4 Full Status Check).
Also, each block can disable erasing. (Refer to Table 20.4).
Figure 20.12 shows a flow chart of the block erase command programming when not using the erasesuspend function. Figure 20.12 shows a flow chart of the block erase command programming when
using an erase-suspend function.
In EW mode 1, do not execute this command on the block where the rewrite control program is allocated.
In EW mode 0, the MCU enters read status register mode as soon as the auto-erase operation starts and
the status register can be read. The SR7 bit in the status register is set to 0 at the same time the autoerase operation starts. This bit is set to 1 when the auto-erase operation is completed. The MCU remains
in read status register mode until the read array command is written.
When the erase error occurs, execute the clear status register command and block erase command at
leaset three times until an erase error does not occur.
Start
Write command code xx2016 (1)
Write xxD016 to the highest-order
block address (1)
FMR00=1?
NO
YES
Full status check (2,3)
Block erase completed
NOTES:
1. Write the command code and data at even address.
2. Refer to Figure 20.14.
3. Execute the clear status register command and block erase command at least 3 times
until an erase error is not generated when an erase error is generated.
Figure 20.12 Flow Chart of Block Erase Command (when not using erase suspend function)
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(EW mode 0)
Start
Interrupt service routine(3)
FMR40=1
FMR41=1
Write the command code
xx2016 (1)
Write xxD016 to the highest-order
block address (1)
FMR46=1?
NO
YES
Access Flash Memory
FMR00=1?
NO
FMR41=0
YES
Full status check (2,4)
Return
(Interrupt service routine end)
Block erase completed
(EW mode 1)
Start
Interrupt service routine
FMR40=1
Access Flash Memory
Write the command code
xx2016 (1)
Return
(Interrupt service routine end)
Write xxD016 to the highest-order
block address (1)
FMR41=0
FMR00=1?
NO
YES
Full status check (2,4)
Block erase completed
NOTES:
1. Write the command code and data to even address.
2. Execute the clear status register command and block erase command at least 3 times until an
erase error is not generated when an erase error is generated.
3. In EW mode 0, allocate an interrupt vector table of an interrupt, to be used, to the RAM area
4. Refer to Figure 20.14.
Figure 20.13 Block Erase Command (at use erase suspend)
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20.8 Status Register
The status register indicates the operating status of the flash memory and whether or not erase or program operation is successfully completed. Bits FMR00, FMR06, and FMR07 in the FMR0 register indicate the status of the status register.
Table 20.6 lists the status register.
In EW mode 0, the status register can be read in the following cases:
(1) Any even address in the user ROM area is read after writing the read status register command
(2) Any even address in the user ROM area is read from when the program or block erase command is
executed until when the read array command is executed.
20.8.1 Sequence Status (SR7 and FMR00 Bits )
The sequence status indicates the flash memory operating status. It is set to 0 (busy) while the autoprogram and auto-erase operation is being executed and 1 (ready) as soon as these operations are
completed. This bit indicates 0 (busy) in erase-suspend mode.
20.8.2 Erase Status (SR5 and FMR07 Bits)
Refer to 20.8.4 Full Status Check.
20.8.3 Program Status (SR4 and FMR06 Bits)
Refer to 20.8.4 Full Status Check.
Table 20.6 Status Register
Bits in the
Bits in the
Status
SRD Register FMR0
Name
Register
Sequence status
SR7 (D7)
FMR00
Reserved
SR6 (D6)
0
1
Value
After
Reset
Busy
Ready
1
-
-
Contents
SR5 (D5)
FMR07
Erase status
Completed normally
Terminated by error
0
SR4 (D4)
FMR06
Program status
Completed normally
Terminated by error
0
SR3 (D3)
Reserved
-
-
SR2 (D2)
Reserved
-
-
SR1 (D1)
Reserved
-
-
SR0 (D0)
Reserved
-
-
• D7 to D0: Indicates the data bus which is read out when executing the read status register command.
• The FMR07 bit (SR5) and FMR06 bit (SR4) are set to 0 by executing the clear status register command.
• When the FMR07 bit (SR5) or FMR06 bit (SR4) is set to 1, the program and block erase command are not accepted.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 351 of 458
20. Flash Memory Version
M16C/29 Group
20.8.4 Full Status Check
If an error occurs, bits FMR06 to FMR07 in the FMR0 register are set to 1, indicating a specific error.
Therefore, execution results can be comfirmed by verifying these status bits (full status check).
Table 20.7 lists errors and FMR0 register state. Figure 20.14 shows a flow chart of the full status check
and handling procedure for each error.
Table 20.7 Errors and FMR0 Register Status
FMR0 register
(SRD register)
status
Error
Error occurrence condition
FMR07
FMR06
(SR5)
(SR4)
1
1
Command
• An incorrect commands is written
sequence error • A value other than xxD016 or xxFF16 is written in the second bus
cycle of the block erase command (1)
• When the block erase command is executed on an protected block
• When the program command is executed on protected blocks
1
0
Erase error
• The block erase command is executed on an unprotected block
but the program operation is not successfully completed
0
1
Program error • The program command is executed on an unprotected block but
the program operation is not successfully completed
Note 1: The flash memory enters read array mode by writing command code xxFF16 in the second bus
cycle of these commands. The command code written in the first bus cycle becomes invalid.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
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20. Flash Memory Version
M16C/29 Group
Full status check
FMR06 =1
and
FMR07=1?
YES
Command
sequence error
NO
NO
FMR07=
0?
Erase error
YES
NO
FMR06=
0?
Program error
YES
(1) Execute the clear status register command and set
the status flag to 0 whether the command is
entered.
(2) Execute the command again after checking that the
correct command is entered or the program
command or the block erase command is not
executed on the protected blocks.
(1) Execute the clear status register command and set
the erase status flag to 0.
(2) Execute the block erase command again.
(3) Execute (1) and (2) at least 3 times until an erase
error does not occur.
Note 1: If the error still occurs, the block can not be
used.
[During programming]
(1) Execute the clear status register command and set
the program status flag to 0.
(2) Execute the program command again.
Note 2: If the error still occurs, the block can not be
used.
Full status check completed
Note 3: If bits FMR06 or FMR07 is 1, any of the program or block erase command cannot be
accepted. Execute the clear status register command before executing those commands.
Figure 20.14 Full Status Check and Handling Procedure for Each Error
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 353 of 458
20. Flash Memory Version
M16C/29 Group
20.9 Standard Serial I/O Mode
In standard serial I/O mode, the serial programmer supporting the M16C/29 group can be used to rewrite
the flash memory user ROM area, while the MCU is mounted on a board. For more information about the
serial programmer, contact your serial programmer manufacturer. Refer to the user’s manual included with
your serial programmer for instruction.
Table 20.8 lists pin description (flash memory standard serial input/output mode). Figures 20.15 and 20.16
show pin connections for standard serial input/output mode.
20.9.1 ID Code Check Function
The ID code check function determines whether or not the ID codes sent from the serial programmer
matches those written in the flash memory. (Refer to 20.3 Functions To Prevent Flash Memory from
Rewriting.)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 354 of 458
20. Flash Memory Version
M16C/29 Group
Table 20.8 Pin Descriptions (Flash Memory Standard Serial I/O Mode)
Pin
Name
VCC,VSS
Power input
CNVSS
CNVS
S
I/O
Descriptio
n
Apply the voltage guaranteed for Program and Erase to Vcc pin and 0
V to Vss pin.
I
Connect to Vcc pin.
RESET
Reset input
I
Reset input pin. While RESET pin is “L”, wait for td(ROC).
XIN
Clock input
I
XOUT
Clock output
O
Connect a ceramic resonator or crystal oscillator between XIN and
XOUT pins. To input an externally generated clock, input it to XIN pin
and open XOUT pin.
AVCC, AVSS
Analog power supply input
VREF
Reference voltage input
I
Enter the reference voltage for AD conversion.
P00 to P07
Input port P0
I
Input “H” or “L” signal or leave open.
P10 to P15, P17
Input port P1
I
Input “H” or “L” signal or leave open.
P16
Input port P1
I
Connect this pin to Vcc while RESET pin is “L”. (2)
P20 to P27
Input port P2
I
Input "H" or “L” level signal or leave open.
P30 to P37
Input port P3
I
Input "H" or “L” level signal or leave open.
P60 to P63
Input port P6
I
Input "H" or “L” level signal or leave open.
P64
BUSY output
O
Standard serial I/O mode 1: BUSY signal output pin
Standard serial I/O mode 2: Monitor signal output pin for boot program
operation check
P65
SCLK input
I
Standard serial I/O mode 1: Serial clock input pin
Standard serial I/O mode 2: Input “L”.
P66
RxD input
I
Serial data input pin
P67
TxD output
O
Serial data output pin (1)
P70 to P77
Input port P7
I
Input “H” or “L” signal or leave open.
P80 to P84,
P87
Input port P8
I
Input “H” or “L” signal or leave open.
P85
RP input
I
Connect this pin to Vss while RESET pin is “L”. (2)
P86
CE input
I
Connect this pin to Vcc while RESET pin is “L”. (2)
P90 to P92,
P95 to P97
Input port P9
I
Input “H” or “L” signal or leave open.
P93
Input port P93 Normal-ver.
T-ver./V-ver.
P100 to P107
Input port P10
Connect AVss to Vss and AVcc to Vcc, respectively.
I/O
“H” signal is output for specific time. Input “H” signal or leave open.
I
Input “H” or “L” signal or leave open.
I
Input “H” or “L” signal or leave open.
NOTES:
___________
1. When using standard serial I/O mode 1, to input “H” to the TxD pin is necessary while the RESET pin is held “L”.
Therefore, connect this pin to VCC via a resistor. Adjust the pull-up resistor value on a system not to affect a data
transfer after reset, because this pin changes to a data-output pin
2. Set the following,
either or both.
_____
-Connect the CE pin to VCC.
_____
-Connect the RP pin to VSS and P16 pin to VCC.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 355 of 458
20. Flash Memory Version
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
P16
(1)
M16C/29 Group
49
32
50
31
51
30
52
29
53
28
54
27
M16C/29 Group (64-pin package)
55
56
26
25
(Flash memory version)
57
16
15
(1)
RP
Vcc
RESET
CE
14
Mode setup method
Value
Signal
Vcc
CNVss
Reset Vss to Vcc
Vcc (1)
P16
(1)
Vcc
CE
Vss (1)
RP
Connect
oscillator
circuit
(1)
13
12
11
10
9
8
7
17
6
18
64
5
19
63
4
20
62
3
21
61
2
22
60
1
TxD
23
59
Vss
SCLK
RxD
24
(PLQP0064KB-A (64P6Q-A))
58
BUSY
NOTE:
1. Set the following, either or both, in serial I/O Mode, while the RESET pin is applied a low-level ("L") signal.
-Connect the CE pin to Vcc.
-Connect the RP pin to Vss and the P16 pin to Vcc.
Figure 20.15 Pin Connections for Serial I/O Mode (1)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 356 of 458
20. Flash Memory Version
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
P16
(1)
M16C/29 Group
61
40
62
39
63
38
64
37
65
36
66
35
67
34
M16C/29 Group (80-pin package)
68
69
33
32
(Flash memory version)
70
71
31
(PLQP0080KB-A(80P6Q-A))
72
73
29
28
TxD
20
19
18
17
SCLK
RP
(1)
Vcc
RESET
CE
RxD
Mode setup method
Signal
Value
CNVss
Vcc
Reset Vss to Vcc
P16
Vcc (1)
CE
Vcc (1)
RP
Vss (1)
Connect
oscillator
circuit
(1)
16
15
14
13
12
11
9
10
21
8
22
80
7
23
79
6
24
78
5
25
77
4
26
76
3
75
2
27
1
74
Vss
BUSY
30
NOTE:
1. Set the following, either or both, in serial I/O Mode, while the RESET pin is applied a low-level ("L") signal.
-Connect the CE pin to Vcc.
-Connect the RP pin to Vss and the P16 pin to Vcc.
Figure 20.16 Pin Connections for Serial I/O Mode (2)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 357 of 458
20. Flash Memory Version
M16C/29 Group
20.9.2 Example of Circuit Application in Standard Serial I/O Mode
Figure 20.17 shows an example of a circuit application in standard serial I/O mode 1 and Figure 20.18
shows an example of a circuit application in standard serial I/O mode 2. Refer to the user's manual of your
serial programmer to handle pins controlled by the serial programmer.
MCU
(1)
SCLK
SCLK input
P86(CE)
TXD
TxD output
BUSY
BUSY output
(1)
P16
RxD
RxD input
CNVss
Reset input
RESET
User reset
singnal
P85(RP)
(1)
(1) Controlling pins and external circuits vary with the serial programmer. For more
information, refer to the user's manual included with the serial programmer.
(2) In this example, a selector controls the input voltage applied to CNVss to switch
between single-chip mode and standard serial I/O mode.
(3) In standard serial input/output mode 1, if the user reset signal becomes “L” while
the MCU is communicating with the serial programmer, break the connection
between the user reset signal and the RESET pin using a jumper switch.
NOTE:
1. Set the following, either or both.
- Connect the CE pin to Vcc
- Connect the RP pin to Vss and the P16 pin to Vcc
Figure 20.17 Circuit Application in Standard Serial I/O Mode 1
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REJ09B0101-0112
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20. Flash Memory Version
M16C/29 Group
MCU
SCLK
TxD output
TxD
Monitor output
BUSY
RxD input
RxD
P86(CE)
P16
(1)
(1)
CNVss
P85(RP)
(1) In this example, a selector controls the input voltage applied to CNVss to switch
between single-chip mode and standard serial I/O mode.
NOTE:
1. Set the following, either or both.
- Connect the CE pin to Vcc
- Connect the RP pin to Vss and the P16 pin to Vcc
Figure 20.18 Circuit Application in Standard Serial I/O Mode 2
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 359 of 458
(1)
20. Flash Memory Version
M16C/29 Group
20.10 Parallel I/O Mode
In parallel input/output mode, the user ROM can be rewritten by a parallel programmer supporting the
M16C/29 group. Contact your parallel programmer manufacturer for more information on the parallel programmer. Refer to the user’s manual included with your parallel programmer for instructions.
20.10.1 ROM Code Protect Function
The ROM code protect function prevents the flash memory from being read or rewritten. (Refer to 20.3
Functions To Prevent Flash Memory from Rewriting).
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 360 of 458
20. Flash Memory Version
M16C/29 Group
20.11 CAN I/O Mode
Note
The CAN I/O mode is not available in M16C/29 T-ver./V-ver.
In CAN I/O mode, the user ROM area can be rewritten while the MCU is mounted on-board by using a CAN
programmer which is applicable for the M16C/29 group. For more information about CAN programmers,
contact the manufacturer of your CAN programmer. For details on how to use, refer to the user’s manual
included with your CAN programmer.
Table 20.9 lists pin functions for CAN I/O mode. Figures 20.19 and 20.20 show pin connections for CAN I/
O mode.
20.11.1 ID code check function
This function determines whether the ID codes sent from the CAN programmer and those written in the
flash memory match.(Refer to 20.3 Functions To Prevent Flash Memory from Rewriting.)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 361 of 458
20. Flash Memory Version
M16C/29 Group
Table 20.9 Pin Functions for CAN I/O Mode
Pin
Name
Description
I/O
Apply the voltage guaranteed for Program and Erase to Vcc pin and 0
V to Vss pin.
VCC,VSS
Power input
CNVSS
CNVSS
I
Connect to Vcc pin.
RESET
Reset input
I
Reset input pin. While RESET pin is "L" level, wait for td(ROC).
XIN
Clock input
I
XOUT
Clock output
O
Connect a ceramic resonator or crystal oscillator between XIN and
XOUT pins. To input an externally generated clock, input it to XIN pin
and open XOUT pin.
AVCC, AVSS
Analog power supply input
VREF
Reference voltage input
I
Enter the reference voltage for AD from this pin.
P00 to P07
Input port P0
I
Input "H" or "L" level signal or leave open.
P10 to P15, P17
Input port P1
I
Input "H" or "L" level signal or leave open.
P16
Input port P1
I
Connect this pin to Vcc while RESET is low. (Note 1)
P20 to P27
Input port P2
I
Input "H" or "L" level signal or leave open.
P30 to P37
Input port P3
I
Input "H" or "L" level signal or leave open.
P60 to P64, P66
Input port P6
I
Input "H" or "L" level signal or leave open.
P65
SCLK input
I
Input "L" level signal.
P67
TxD output
O
Input "H" level signal.
P70 to P77
Input port P7
I
Input "H" or "L" level signal or leave open.
P80 to P84,
P87
Input port P8
I
Input "H" or "L" level signal or leave open.
P85
RP input
I
Connect this pin to Vss while RESET is low. (Note 1)
P86
CE input
I
Connect this pin to Vcc while RESET is low. (Note 1)
P90 to P91,
P95 to P97
Input port P9
I
Input "H" or "L" level signal or leave open.
P92
CRX input
I
Connect this pin to a CAN transceiver.
P93
CTX output
O
Connect this pin to a CAN transceiver.
P100 to P107
Input port P10
I
Input "H" or "L" level signal or leave open.
Connect AVss to Vss and AVcc to Vcc, respectively.
NOTE:
1. Set following either or both.
_____
•Connect the CE pin to VCC.
_____
•Connect the RP pin to VSS and the P16 pin to VCC.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 362 of 458
20. Flash Memory Version
33
34
35
36
37
38
39
40
41
42
43
44
49
32
50
31
51
30
52
29
53
28
54
27
M16C/29 Group (64-pin package)
55
57
25
23
16
15
14
13
12
11
10
9
8
7
17
6
18
64
5
19
63
4
20
62
3
21
61
2
22
60
1
59
Note
RP
Vcc
RESET
CE
Vss
Note
Connect
oscillator
circuit
NOTE:
1. Set following either or both in serial I/O mode while the RESET pin is held “L”.
•Connect the CE pin to VCC
•Connect the RP pin to VSS and the P16 pin to VCC
Figure 20.19 Pin Connections for CAN I/O Mode (1)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 363 of 458
TxD
24
(PLQ0064KB-A (64P6Q-A))
58
SCLK
26
(Flash memory version)
56
CTx
CRx
45
46
47
48
P16
Note
M16C/29 Group
Mode setup method
Signal
Value
CNVss
Vcc
Reset Vss to Vcc
P16
Vcc (1)
CE
Vcc (1)
RP
Vss (1)
SCLK
Vss
TxD
Vcc
20. Flash Memory Version
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
P16
(1)
M16C/29 Group
61
40
62
39
63
38
64
37
65
36
66
35
M16C/29 Group (80-pin package)
67
68
34
33
(Flash memory version)
69
70
32
31
(PLQP0080KB-A (80P6Q-A))
71
20
19
18
RP
(1)
Vcc
RESET
CE
(1)
TxD
Mode setup method
Signal
Value
CNVss
Vcc
Reset Vss to Vcc
P16
Vcc (1)
CE
Vcc (1)
RP
Vss (1)
SCLK
Vss
TxD
Vcc
Connect
oscillator
circuit
CTx
CRx
17
16
15
14
13
9
12
21
11
22
80
10
23
79
8
24
78
7
25
77
6
26
76
5
75
4
27
3
28
74
2
73
1
29
Vss
SCLK
30
72
NOTE:
1. Set following either or both in serial I/O mode while the RESET pin is held “L”.
•Connect the CE pin to VCC
•Connect the RP pin to VSS and the P16 pin to VCC
Figure 20.20 Pin Connections for CAN I/O Mode (2)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 364 of 458
20. Flash Memory Version
M16C/29 Group
20.11.2 Example of Circuit Application in CAN I/O Mode
Figure 20.21 shows example of circuit application in CAN I/O mode. Refer to the user’s manual for CAN
programmer to handle pins controlled by a CAN programmer.
MCU
TXD
SCLK
CAN transceiver
(Note 1)
P86(CE)
(Note 1)
CAN_H
P92/CRx
CAN_L
P93/CTx
P16
CNVss
Reset input
RESET
User reset
singnal
P85(RP)
(1) Control pins and external circuits vary with the CAN programmer.
For more information, refer to the user's manual include with the CAN programmer.
(2) In this example, a selector controls the input voltage applied to CNVss to switch
between single-chip mode and CAN I/O mode.
Note 1. Set following either or both.
•Connect the CE pin to VCC
•Connect the RP pin to VSS and the P16 pin to VCC
Figure 20.21 Circuit Application in CAN I/O Mode
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 365 of 458
(Note 1)
21. Electrical Characteristics (Normal-version)
M16C/29 Group
21. Electrical Characteristics
21.1 Normal version
Table 21.1 Absolute Maximum Ratings
Condition
Value
Unit
VCC
Symbol
Supply Voltage
VCC=AVCC
-0.3 to 6.5
V
AVCC
Analog Supply Voltage
VCC=AVCC
-0.3 to 6.5
V
VI
Input Voltage
P00 to P07, P10 to P17, P20 to P27,
P30 to P37, P60 to P67, P70 to P77,
P80 to P87, P90 to P93, P95 to P97,
P100 to P107,
XIN, VREF, RESET, CNVSS
-0.3 to VCC+0.3
V
Output Voltage P00 to P07, P10 to P17, P20 to P27,
P30 to P37, P60 to P67, P70 to P77,
P80 to P87, P90 to P93, P95 to P97,
P100 to P107,
XOUT
-0.3 to VCC+0.3
V
300
mW
-20 to 85 /
-40 to 85(1)
°C
Program Space
(Block 0 to Block 5)
0 to 60
°C
Data Space
(Block A, Block B)
-20 to 85 /
-40 to 85(1)
°C
-65 to 150
°C
VO
Pd
Parameter
-40<Topr<85° C
Power Dissipation
during CPU operation
Topr
Tstg
Operating
Ambient
Temperature
during flash memory
program and erase
operation
Storage Temperature
NOTE:
1. Refer to Table 1.6.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 366 of 458
M16C/29 Group
21. Electrical Characteristics (Normal-version)
Table 21.2 Recommended Operating Conditions (Note 1)
Symbol
Standard
Parameter
Min.
2.7
Typ.
Max.
5. 5
Unit
VCC
AVCC
Supply Voltage
Analog Supply Voltage
VSS
Supply Voltage
0
V
AVSS
Analog Supply Voltage
0
V
VIH
Input High ("H")
Voltage
VIL
Input Low ("L")
Voltage
VCC
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
0.7VCC
P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
0.8VCC
XIN, RESET, CNVSS
VCC
V
VCC
V
When I2C bus input level is selected
0.7VCC
SDAMM, SCLMM
When SMBUS input level is selected
1.4
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
0
P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
VCC
VCC
0.3VCC
V
V
V
0
0.2VCC
V
0
0
0.3VCC
0.6
-10.0
V
V
mA
-5.0
mA
10.0
mA
5.0
mA
0
20
MHz
0
33 X VCC-80
MHz
XIN, RESET, CNVSS
When I2C bus input level is selected
SDAMM, SCLMM
When SMBUS input level is selected
Peak Output High P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
("H") Current
P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Average Output
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
High ("H") Current P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Peak Output Low P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
("L") Current
P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Average Output
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
Low ("L") Current P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Main Clock Input Oscillation Frequency(4)
VCC=3.0 to 5.5V
IOH(peak)
IOH(avg)
IOL(peak)
IOL(avg)
f(XIN)
VCC=2.7 to 3.0V
f(XCIN)
V
V
32.768
50
kHz
f1(ROC) On-chip Oscillator Frequency 1
Sub Clock Oscillation Frequency
0.5
1
2
MHz
f2(ROC) On-chip Oscillator Frequency 2
1
2
4
MHz
8
16
f3(ROC) On-chip Oscillator Frequency 3
PLL Clock Oscillation Frequency(4)
f(PLL)
26
MHz
VCC=3.0 to 5.5V
10
20
MHz
VCC=2.7 to 3.0V
10
33 X VCC-80
MHz
0
20
MHz
VCC=5.0V
20
ms
VCC=3.0V
50
ms
f(BCLK) CPU Operation Clock Frequency
tSU(PLL) Wait Time to Stabilize PLL Frequency Synthesizer
NOTES:
1. Referenced to VCC = 2.7 to 5.5V at Topr = -20 to 85 ° C / -40 to 85 ° C unless otherwise specified.
2. The mean output current is the mean value within 100ms.
3. The total IOL(peak) for all ports must be 80mA or less. The total IOH(peak) for all ports must be -80mA or less.
4. Relationship among main clock oscillation frequency, PLL clock oscillation frequency and supply voltage.
AAAAA
AAAAA
AAAAA
AAAAA
AAAAA
AAAAA
33.3 x VCC-80 MHZ
20.0
10.0
0.0
2.7 3.0
VCC[V] (main clock: no division)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 367 of 458
5.5
PLL clock oscillation frequency
f(PLL) operating maximum frequency [MHZ]
f(XIN) operating maximum frequency [MHZ]
Main clock input oscillation frequency
AAAAA
AAAAA
AAAAA
AAAAA
33.3 x VCC-80 MHZ
20.0
10.0
0.0
2.7 3.0
VCC[V] (PLL clock oscillation)
5.5
21. Electrical Characteristics (Normal-version)
M16C/29 Group
Table 21.3 A/D Conversion Characteristics (Note 1)
Symbol
-
Parameter
Resolution
Integral Nonlinearity
Error
INL
Measurement Condition
10 bit
8 bit
-
Absolute Accuracy
10 bit
8 bit
Standard
Min.
Typ. Max.
Unit
VREF=VCC
10
Bits
VREF=VCC=5V
±3
LSB
VREF=VCC=3.3V
±5
LSB
VREF=VCC=3.3V
±2
LSB
VREF=VCC=5V
±3
LSB
VREF=VCC=3.3V
±5
LSB
VREF=VCC=3.3V
±2
LSB
Differential Nonlinearity Error
±1
LSB
-
Offset Error
±3
LSB
-
Gain Error
±3
LSB
40
kΩ
DNL
RLADDER
Resistor Ladder
VREF=VCC
10
tCONV
10-bit Conversion Time
Sample & Hold Function Available
VREF=VCC=5V, φAD=10MHz
3.3
µs
tCONV
8-bit Conversion Time
Sample & Hold Function Available
VREF=VCC=5V, φAD=10MHz
2.8
µs
VREF
Reference Voltage
VIA
Analog Input Voltage
2.0
VCC
V
0
VREF
V
NOTES:
1. Referenced to VCC=AVCC=VREF= 3.3 to 5.5V, VSS=AVSS=0V at Topr = -20 to 85 ° C / -40 to 85° C unless otherwise
specified.
2. Keep φAD frequency at 10 MHz or less. Additionally, divide the fAD if VCC is less than 4.2V, and make φAD
frequency equal to or lower than fAD/2.
3. When sample & hold function is disabled, keep φAD frequency at 250 kHz or more in addition to the limitation in Note 2.
When sample & hold function is enabled, keep φAD frequency at 1 MHz or more in addition to the limitation in Note 2.
4. When sample & hold function is enabled, sampling time is 3/ φAD frequency.
When sample & hold function is disabled, sampling time is 2/ φAD frequency.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 368 of 458
M16C/29 Group
21. Electrical Characteristics (Normal-version)
Table 21.4 Flash Memory Version Electrical Characteristics (1) for 100/1000 E/W cycle products
[Program Space and Data Space in U3 and U5: Program Space in U7 and U9]
Symbol
Standard
Parameter
Min.
Typ.(2)
(
4
,
1
100/1000 1)
Max.
Unit
-
Program and Erase Endurance(3)
-
Word Program Time (VCC=5.0V, Topr=25° C)
75
600
µs
-
Block Erase Time
(VCC=5.0V, Topr=25° C)
0.2
0.4
0.7
1.2
9
9
9
9
8
15
s
s
s
s
ms
µs
td(SR-ES)
tPS
-
2-Kbyte Block
8-Kbyte Block
16-Kbyte Block
32-Kbyte Block
Duration between Suspend Request and Erase Suspend
Wait Time to Stabilize Flash Memory Circuit
Data Hold Time (5)
cycles
20
years
Table 21.5 Flash Memory Version Electrical Characteristics (6) 10000 E/W cycle products (Option)
[Data Space in U7 and U9(7)]
Symbol
Standard
Parameter
Min.
Typ.(2)
(
4
,
1
0
)
10000
Max.
Unit
-
Program and Erase Endurance(3, 8, 9)
-
Word Program Time (VCC = 5.0 V, Topr = 25° C)
100
µs
-
Block Erase Time (VCC = 5.0 V, Topr = 25° C)
(2-Kbyte block)
Duration between Suspend Request and Erase Suspend
Wait Time to Stabilize Flash Memory Circuit
Data Hold Time (5)
0.3
s
cycles
td(SR-ES)
8
ms
µs
15
tPS
20
years
NOTES:
1. Referenced to VCC = 2.7 to 5.5 V at Topr = 0 to 60° C (program space), unless otherwise specified.
2. VCC = 5.0 V; Topr = 25° C
3. Program and erase endurance is defined as number of program-erase cycles per block.
If program and erase endurance is n cycle (n = 100, 1000, 10000), each block can be erased and programmed n
cycles.
For example, if a 2-Kbyte block A is erased after programming one-word data to each address 1,024 times,
this counts as one program and erase endurance. Data cannot be programmed to the same address more than
once without erasing the block. (rewrite prohibited).
4. Number of E/W cycles for which operation is guranteed (1 to minimum value are guaranteed).
5. Topr = 55° C
6. Referenced to VCC = 2.7 to 5.5 V at Topr = -40 to 85° C(U7) / -20 to 85° C (U9) unless otherwise specifie.
7. Table 21.5 applies for data space in U7 and U9 when program and erase endurance is more than 1,000 cycles.
Otherwise, use Table 21.4.
8. To reduce the number of program and erase endurance when working with systems requiring numerous rewrites,
write to unused word addresses within the block instead of rewrite. Erase block only after all possible addresses
are used. For example, an 8-word program can be written 128 times maximum before erase becomes necessary.
Maintaining an equal number of times erasure between block A and block B will also improve efficiency. It is
recommended to track the total number of erasure performed per block and to limit the number of erasure.
9. If an erase error is generated during block erase, execute the clear status register command and block erase
command at least 3 times until an erase error is not generated.
10. When executing more than 100 times rewrites, set one wait state per block access by setting the FMR17 bit in
the FMR1 register 1 to 1 (wait state). When accessing to all other blocks and internal RAM, wait state can be
set by the PM17 bit, regardless of the FMR17 bit setting value.
11. The program and erase endurance is 100 cycles for program space and data space in U3 and U5; 1,000 cycles
for program space in U7 and U9.
12. Please contact Renesas Technology Corp. or an authorized Renesas Technology Corp. product distributor for
further details on the E/W failure rate.
Erase suspend
request
(interrupt request)
FMR46
td(SR-ES)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 369 of 458
21. Electrical Characteristics (Normal-version)
M16C/29 Group
Table 21.6 Low Voltage Detection Circuit Electrical Characteristics (Note 1, Note 3)
Symbol
Parameter
Measurement Condition
Standard
Min.
Typ.
Max.
Unit
Vdet4
Low Voltage Detection Voltage(1)
3.2
3.8
4.45
V
Vdet3
Reset Space Detection Voltage(1)
2.3
2.8
3.4
V
1.7
V
2.35
2.9
3.5
V
VCC=0.8 to 5.5V
Vdet3s
Low Voltage Reset Hold
Vdet3r
Low Voltage Reset Release Voltage
Voltage(2)
NOTES:
1. Vdet4 >Vdet3
2. Vdet3s is the minmum voltage to maintain brown-out detection reset (hardware reset 2).
3. The low Voltage detection circuit is designed to use when VCC is set to 5V.
4. If the supply power voltage is greater than the reset level detection voltage when the reset level detection
voltage is less than 2.7V, the operation at f(BCLK) < 10MHz is guranteed. However, A/D conversion, serial I/O,
flash memory program and erase are excluded.
Table 21.7 Power Supply Circuit Timing Characteristics
Symbol
td(P-R)
Parameter
Measurement Condition
Standard
Min.
Typ.
Wait Time to Stabilize Internal Supply Voltage when Power-on
td(ROC) Wait Time to Stabilize Internal On-chip Oscillator when Power-on
td(R-S)
STOP Release Time
td(W-S)
Low Power Dissipation Mode Wait Mode Release Time
td(S-R)
Hardware Reset 2 Release Wait Time
td(E-A)
Low Voltage Detection Circuit Operation Start Time
VCC = 2.7 to 5.5 V
VCC = Vdet3r to 5.5 V
VCC = 2.7 to 5.5 V
NOTE:
1. When VCC=5
td(P-R)
Wait time to stabilize internal
supply voltage when power-on
VCC
ROC
td(ROC)
Wait time to stabilize internal
on-chip oscillator when poweron
td(ROC)
RESET
Interrupt for
(a) Stop mode release
or
(b) Wait mode release
td(R-S)
STOP release time
td(W-S)
td(P-R)
Low power dissipation mode
wait mode release time
CPU clock
(a)
td(R-S)
(b)
td(W-S)
td(S-R)
Brown-out detection
reset (hardware reset 2)
release wait time
VCC
Vdet3r
td(S-R)
CPU clock
td(E-A)
VC26, VC27
Voltage detection circuit
operation start time
Voltage Detection Circuit
Stop
Operate
td(E-A)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 370 of 458
6(1)
Max.
Unit
2
ms
40
µs
150
µs
150
µs
20
ms
20
µs
M16C/29 Group
21. Electrical Characteristics (Normal-version)
VCC = 5V
Table 21.8 Electrical Characteristics (Note 1)
Symbol
VOH
VOH
Parameter
Output High P00 to
("H") Voltage P70 to
Output High P00 to
("H") Voltage P70 to
P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
IOH=-5mA
P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
IOH=-200µA
VCC-0.3
VCC
High Power
IOH=-1mA
VCC-2.0
VCC
Low Power
IOH=-0.5mA
VCC-2.0
VCC
High Power
No load applied
2.5
Low Power
No load applied
1.6
P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Output High ("H") Voltage
XOUT
Output High ("H") Voltage
XCOUT
VOL
Output Low P00 to
("L") Voltage P70 to
Output Low P00 to
("L") Voltage P70 to
Min.
Unit
V
V
V
V
P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
IOL=5mA
2.0
V
P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
IOL=200µA
0.45
V
High Power
IOL=1mA
2.0
Low Power
IOL=0.5mA
2.0
High Power
No load applied
0
Low Power
No load applied
0
P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Output Low ("L") Voltage
XOUT
Output Low ("L") Voltage
XCOUT
VOL
VT+-VT- Hysteresis
Standard
Typ. Max.
VCC
VCC-2.0
VOH
VOL
Condition
0.2
TA0IN-TA4IN, TB0IN-TB2IN, INT0-INT5, NMI, ADTRG, CTS0CTS2, SCL, SDA, CLK0-CLK2, TA2OUT-TA4OUT, KI0-KI3, RXD0-
V
V
1.0
V
RXD2, SIN3, SIN4
VT+-VT- Hysteresis
RESET
0.2
2.5
V
VT+-VT- Hysteresis
XIN
0.2
0.8
V
VI=5V
5.0
µA
XIN, RESET, CNVSS
Input Low
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
("L") Current P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
VI=0V
-5.0
µA
XIN, RESET, CNVSS
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
VI=0V
170
kΩ
IIH
IIL
Input High
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
("H") Current P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
RPULLUP Pull-up
Resistance
30
50
RfXIN
Feedback Resistance
XIN
1.5
MΩ
RfXCIN
Feedback Resistance
XCIN
15
MΩ
VRAM
RAM Standby Voltage
In stop mode
2.0
V
NOTES:
1. Referenced to VCC=4.2 to 5.5V, VSS=0V at Topr=-20 to 85 ° C / -40 to 85 ° C, f(BCLK)=20MHz unless otherwise specified.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 371 of 458
21. Electrical Characteristics (Normal-version)
M16C/29 Group
VCC = 5V
Table 21.9 Electrical Characteristics (2) (Note 1)
Symbol
ICC
Parameter
Measurement Condition
Power Supply
Output pins are Mask ROM
Current
left open and
(VCC=4.2 to 5.5V) other pins are
connected to VSS
Flash memory
Flash memory
program
Flash memory
erase
Mask ROM
Flash memory
Mask ROM,
Flash memory
f(BCLK) = 20 MHz,
main clock, no division
On-chip oscillation, f2(ROC) selected,
f(BCLK) = 1 MHz
f(BCLK) = 20 MHz,
main clock, no division
On-chip oscillation, f2(ROC) selected,
f(BCLK) = 1 MHz
Standard
Min.
Typ.
18
Unit
Max.
25 mA
2
18
mA
25
mA
2
mA
11
mA
f(BCLK) = 10 MHz, Vcc = 5.0 V
11
mA
f(BCLK) = 32 kHz,
In low-power consumption mode,
Program running on ROM(3)
On-chip oscillation,
f2(ROC) selected, f(BCLK) = 1 MHz,
In wait mode
f(BCLK) = 32 kHz,
In low-power consumption mode,
Program running on RAM(3)
f(BCLK) = 32 kHz,
In low-power consumption mode,
Program running on flash memory(3)
On-chip oscillation,
f2(ROC) selected, f(BCLK) = 1 MHz,
In wait mode(4)
f(BCLK) = 32 kHz, In wait mode(2),
Oscillation capacity high
f(BCLK) = 32 kHz, In wait mode(2),
Oscillation capacity low
While clock stops, Topr = 25° C
25
µA
50
µA
25
µA
450
µA
50
µA
8.5
µA
3
µA
f(BCLK) = 10 MHz, Vcc = 5.0 V
µA
0.8
3
µA
Idet4
Low voltage detection dissipation current(4)
0.7
4
µA
Idet3
Reset area detection dissipation current(4)
1.2
8
NOTES:
1. Referenced to VCC = 4.2 to 5.5 V, VSS = 0 V at Topr = -20 to 85° C / -40 to 85 ° C, f(BCLK) = 20 MHz unless otherwise
specified.
2. With one timer operates, using fC32.
3. This indicates the memory in which the program to be executed exists.
4. Idet is dissipation current when the following bit is set to 1 (detection circuit enabled).
Idet4: VC27 bit in the VCR2 register
Idet3: VC26 bit in the VCR2 register
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 372 of 458
M16C/29 Group
21. Electrical Characteristics (Normal-version)
VCC = 5V
Timing Requirements
(VCC = 5V, VSS = 0V, at Topr = – 20 to 85oC / – 40 to 85oC unless otherwise specified)
Table 21.10 External Clock Input (XIN input)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc
External Clock Input Cycle Time
50
ns
tw(H)
External Clock Input High ("H") Width
20
ns
tw(L)
External Clock Input Low ("L") Width
20
ns
tr
External Clock Rise Time
9
ns
tf
External Clock Fall Time
9
ns
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 373 of 458
21. Electrical Characteristics (Normal-version)
M16C/29 Group
VCC = 5V
Timing Requirements
(VCC = 5V, VSS = 0V, at Topr = – 20 to 85oC / – 40 to 85oC unless otherwise specified)
Table 21.11 Timer A Input (Counter Input in Event Counter Mode)
Symbol
Parameter
tc(TA)
TAiIN input cycle time
tw(TAH)
TAiIN input HIGH pulse width
tw(TAL)
TAiIN input LOW pulse width
Standard
Max.
Min.
100
40
40
Unit
ns
ns
ns
Table 21.12 Timer A Input (Gating Input in Timer Mode)
Symbol
Parameter
tc(TA)
TAiIN input cycle time
tw(TAH)
tw(TAL)
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
Standard
Min.
Max.
400
200
200
Unit
ns
ns
ns
Table 21.13 Timer A Input (External Trigger Input in One-shot Timer Mode)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc(TA)
TAiIN input cycle time
200
ns
tw(TAH)
tw(TAL)
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
100
100
ns
ns
Table 21.14 Timer A Input (External Trigger Input in Pulse Width Modulation Mode)
Symbol
tw(TAH)
tw(TAL)
Parameter
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
Standard
Max.
Min.
100
100
Unit
ns
ns
Table 21.15 Timer A Input (Counter Increment/decrement Input in Event Counter Mode)
tc(UP)
TAiOUT input cycle time
tw(UPH)
TAiOUT input HIGH pulse width
Standard
Min.
Max.
2000
1000
tw(UPL)
tsu(UP-TIN)
TAiOUT input LOW pulse width
TAiOUT input setup time
TAiOUT input hold time
1000
400
400
Symbol
th(TIN-UP)
Parameter
Unit
ns
ns
ns
ns
ns
Table 21.16 Timer A Input (Two-phase Pulse Input in Event Counter Mode)
Symbol
tc(TA)
Parameter
TAiIN input cycle time
tsu(TAIN-TAOUT)
TAiOUT input setup time
tsu(TAOUT-TAIN)
TAiIN input setup time
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 374 of 458
Standard
Min.
Max.
800
200
200
Unit
ns
ns
ns
M16C/29 Group
21. Electrical Characteristics (Normal-version)
VCC = 5V
Timing Requirements
(VCC = 5V, VSS = 0V, at Topr = – 20 to 85oC / – 40 to 85oC unless otherwise specified)
Table 21.17 Timer B Input (Counter Input in Event Counter Mode)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc(TB)
TBiIN input cycle time (counted on one edge)
100
ns
tw(TBH)
TBiIN input HIGH pulse width (counted on one edge)
40
ns
tw(TBL)
TBiIN input LOW pulse width (counted on one edge)
TBiIN input cycle time (counted on both edges)
40
200
ns
tc(TB)
tw(TBH)
TBiIN input HIGH pulse width (counted on both edges)
80
ns
tw(TBL)
TBiIN input LOW pulse width (counted on both edges)
80
ns
ns
Table 21.18 Timer B Input (Pulse Period Measurement Mode)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc(TB)
TBiIN input cycle time
400
ns
tw(TBH)
tw(TBL)
TBiIN input HIGH pulse width
TBiIN input LOW pulse width
200
200
ns
ns
Table 21.19 Timer B Input (Pulse Width Measurement Mode)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc(TB)
TBiIN input cycle time
400
tw(TBH)
TBiIN input HIGH pulse width
200
ns
200
ns
tw(TBL)
TBiIN input LOW pulse width
ns
Table 21.20 A /D Trigger Input
Symbol
tc(AD)
tw(ADL)
Parameter
ADTRG input cycle time (trigger able minimum)
ADTRG input LOW pulse width
Standard
Min.
1000
125
Max.
Unit
ns
ns
Table 21.21 Serial I/O
Symbol
tc(CK)
tw(CKH)
tw(CKL)
td(C-Q)
th(C-Q)
tsu(D-C)
th(C-D)
Parameter
Standard
Min.
Max.
Unit
CLKi input cycle time
200
ns
CLKi input HIGH pulse width
100
ns
CLKi input LOW pulse width
100
ns
80
TxDi output delay time
TxDi hold time
RxDi input setup time
RxDi input hold time
ns
0
ns
70
90
ns
ns
_______
Table 21.22 External Interrupt INTi Input
Symbol
Parameter
Standard
Min.
Max.
Unit
tw(INH)
INTi input HIGH pulse width
250
ns
tw(INL)
INTi input LOW pulse width
250
ns
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 375 of 458
21. Electrical Characteristics (Normal-version)
M16C/29 Group
VCC = 5V
Timing Requirements
(VCC = 5V, VSS = 0V, at Topr = – 20 to 85oC / – 40 to 85oC unless otherwise specified)
Table 21.23 Multi-master I2C bus Line
Symbol
Parameter
Standard clock mode
Min.
Max.
High-speed clock mode
Min.
Max.
Unit
tBUF
Bus free time
4.7
1.3
µs
tHD;STA
The hold time in start condition
0.6
µs
tLOW
The hold time in SCL clock 0 status
4.0
4.7
1.3
20+0.1Cb
µs
tR
SCL, SDA signals' rising time
tHD;DAT
Data hold time
tHIGH
The hold time in SCL clock 1 status
1000
0
0
4.0
0.6
20+0.1Cb
300
ns
0.9
µs
µs
tF
SCL, SDA signals' falling time
tSU;DAT
Data setup time
250
100
ns
tSU;STA
The setup time in restart condition
4.7
0.6
tSU;STO
µs
Stop condition setup time
4.0
0.6
µs
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 376 of 458
300
300
ns
M16C/29 Group
21. Electrical Characteristics (Normal-version)
VCC = 5V
XIN input
tf
tw(H)
tr
tw(L)
tc
tc(TA)
tw(TAH)
TAiIN input
tw(TAL)
tc(UP)
tw(UPH)
TAiOUT input
tw(UPL)
TAiOUT input
(Up/down input)
During Event Counter Mode
TAiIN input
(When count on falling
edge is selected)
TAiIN input
(When count on rising
edge is selected)
th(TIN-UP) tsu(UP-TIN)
Two-Phase Pulse Input in Event Counter Mode
tc(TA)
TAiIN input
tsu(TAIN-TAOUT)
tsu(TAIN-TAOUT)
tsu(TAOUT-TAIN)
TAiOUT input
tsu(TAOUT-TAIN)
tc(TB)
tw(TBH)
TBiIN input
tw(TBL)
tc(AD)
tw(ADL)
ADTRG input
Figure 21.1 Timing Diagram (1)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 377 of 458
21. Electrical Characteristics (Normal-version)
M16C/29 Group
VCC = 5V
tc(CK)
tw(CKH)
CLKi
tw(CKL)
th(C–Q)
TxDi
td(C–Q)
tsu(D–C)
RxDi
th(C–D)
tw(INL)
INTi input
tw(INH)
Figure 21.2 Timing Diagram (2)
VCC = 5V
SDA
tHD:STA
tBUF
tLOW
SCL
p
tR
tF
Sr
S
tHD:STA
tHD:DTA
Figure 21.3 Timing Diagram (3)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 378 of 458
tsu:STO
tHIGH
tsu:DAT
tsu:STA
p
M16C/29 Group
21. Electrical Characteristics (Normal-version)
VCC = 3V
Table 21.24 Electrical Characteristics (Note 1)
Symbol
VOH
Parameter
Output High ("H") Voltage
XOUT
Output High ("H") Voltage
XCOUT
IOH = -1 mA
High Power
IOH = -0.1 mA
VCC-0.5
VCC
Low Power
IOH = -50 µA
VCC-0.5
VCC
High Power
No load applied
2.5
Low Power
No load applied
1.6
Output Low P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
("L") Voltage P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Output Low ("L") Voltage
XOUT
Output Low ("L") Voltage
XCOUT
VOL
Standard
Typ. Max.
VCC
VCC-0.5
Output High P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
("H") Voltage P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
VOH
VOL
Condition
Min.
Unit
V
V
V
IOL = 1 mA
0.5
High Power
IOL = 0.1 mA
0.5
Low Power
IOL = 50 µA
0.5
High Power
No load applied
0
Low Power
No load applied
0
V
V
V
VT+-VT- Hysteresis
TA0IN-TA4IN, TB0IN-TB2IN, INT0-INT5, NMI, ADTRG, CTS0CTS2, SCL, SDA, CLK0-CLK2, TA2OUT-TA4OUT, KI0-KI3, RXD0RXD2, SIN3, SIN4
0.8
V
VT+-VT- Hysteresis
RESET
1.8
V
VT+-VT- Hysteresis
XIN
IIH
IIL
RPULLUP
Input High
P00 to P07, P10 to P17,
("H") Current P70 to P77, P80 to P87,
XIN, RESET, CNVSS
Input Low
P00 to P07, P10 to P17,
("L") Current P70 to P77, P80 to P87,
XIN, RESET, CNVSS
Pull-up
P00 to P07, P10 to P17,
Resistance P70 to P77, P80 to P87,
0.8
V
P20 to P27, P30 to P37, P60 to P67,
P90 to P93, P95 to P97, P100 to P107
VI = 3 V
4.0
µA
P20 to P27, P30 to P37, P60 to P67,
P90 to P93, P95 to P97, P100 to P107
VI = 0 V
-4.0
µA
P20 to P27, P30 to P37, P60 to P67,
P90 to P93, P95 to P97, P100 to P107
VI = 0 V
100 500
kΩ
3.0
MΩ
25
MΩ
RfXIN
Feedback Resistance
XIN
RfXCIN
Feedback Resistance
XCIN
VRAM
RAM Standby Voltage
In stop mode
50
2.0
NOTE:
1. Referenced to VCC = 2.7 to 3.6 V, VSS = 0 V at Topr = -20 to 85 ° C / -40 to 85 ° C, f(BCLK) = 10MHz unless otherwise
specified.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 379 of 458
V
21. Electrical Characteristics (Normal-version)
M16C/29 Group
VCC = 3V
Table 21.25 Electrical Characteristics (2) (Note 1)
Symbol
ICC
Parameter
Measurement Condition
Power Supply
Current
(VCC = 2.7 to 3.6V)
Output pins are Mask ROM
left open and
other pins are
connected to VSS
f(BCLK) = 10 MHz,
main clock, no division
On-chip oscillation,
f2(ROC) selected, f(BCLK) = 1 MHz
Flash memory f(BCLK) = 10 MHz,
main clock, no division
Flash memory
f(BCLK) = 10 MHz, Vcc = 3.0 V
program
Flash memory f(BCLK) = 10 MHz, Vcc= 3.0 V
erase
Mask ROM
f(BCLK) = 32 kHz,
In low-power consumption mode,
Program running on ROM(3)
On-chip oscillation,
f2(ROC) selected, f(BCLK) = 1 MHz,
In wait mode
Flash memory f(BCLK) = 32 kHz,
In low-power consumption mode,
Program running on RAM(3)
f(BCLK) = 32 kHz,
In low-power consumption mode,
Program running on flash memory(3)
On-chip oscillation,
f2(ROC) selected, f(BCLK) = 1 MHz,
In wait mode(4)
Mask ROM,
f(BCLK) = 32 kHz, In wait mode(2),
Flash memory Oscillation capacity high
f(BCLK) = 32 kHz, In wait mode(2),
Oscillation capacity low
While clock stops, Topr = 25° C
Low voltage detection dissipation current(4)
Reset level detection dissipation current(4)
Standard
Min.
Typ.
8
Unit
Max.
13 mA
1
8
mA
13
mA
11
mA
11
mA
20
µA
25
µA
20
µA
450
µA
45
µA
6.6
µA
2.2
µA
µA
0.7
3
µA
Idet4
0.6
4
µA
Idet3
1.0
5
NOTES:
1. Referenced to VCC = 2.7 to 3.6 V, VSS = 0 V at Topr = -20 to 85 ° C / -40 to 85 ° C, f(BCLK) = 10 MHz unless otherwise
specified.
2. With one timer operates, using fC32.
3. This indicates the memory in which the program to be executed exists.
4. Idet is dissipation current when the following bit is set to 1 (detection circuit enabled).
Idet4: the VC27 bit of the VCR2 register
Idet3: the VC26 bit in the VCR2 register
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 380 of 458
M16C/29 Group
21. Electrical Characteristics (Normal-version)
VCC = 3V
Timing Requirements
(VCC = 3V, VSS = 0V, at Topr = – 20 to 85oC / – 40 to 85oC unless otherwise specified)
Table 21.26 External Clock Input (XIN input)
Symbol
tc
tw(H)
tw(L)
tr
tf
Parameter
External clock input cycle time
External clock input HIGH pulse width
External clock input LOW pulse width
External clock rise time
External clock fall time
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 381 of 458
Standard
Min.
Max.
100
40
40
18
18
Unit
ns
ns
ns
ns
ns
21. Electrical Characteristics (Normal-version)
M16C/29 Group
VCC = 3V
Timing Requirements
(VCC = 3V, VSS = 0V, at Topr = – 20 to 85oC / – 40 to 85oC unless otherwise specified)
Table 21.27 Timer A Input (Counter Input in Event Counter Mode)
Symbol
Parameter
tc(TA)
TAiIN input cycle time
tw(TAH)
TAiIN input HIGH pulse width
tw(TAL)
TAiIN input LOW pulse width
Standard
Max.
Min.
150
60
60
Unit
ns
ns
ns
Table 21.28 Timer A Input (Gating Input in Timer Mode)
Symbol
tc(TA)
tw(TAH)
tw(TAL)
Parameter
TAiIN input cycle time
Standard
Min.
Max.
600
300
300
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
Unit
ns
ns
ns
Table 21.29 Timer A Input (External Trigger Input in One-shot Timer Mode)
Symbol
tc(TA)
tw(TAH)
tw(TAL)
Parameter
Standard
Min.
Max.
Unit
TAiIN input cycle time
300
ns
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
150
150
ns
ns
Table 21.30 Timer A Input (External Trigger Input in Pulse Width Modulation Mode)
Symbol
tw(TAH)
tw(TAL)
Parameter
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
Standard
Max.
Min.
150
150
Unit
ns
ns
Table 21.31 Timer A Input (Counter Increment/decrement Input in Event Counter Mode)
tc(UP)
TAiOUT input cycle time
tw(UPH)
tw(UPL)
tsu(UP-TIN)
th(TIN-UP)
TAiOUT input HIGH pulse width
Standard
Min.
Max.
3000
1500
TAiOUT input LOW pulse width
TAiOUT input setup time
TAiOUT input hold time
1500
600
600
Symbol
Parameter
Unit
ns
ns
ns
ns
ns
Table 21.32 Timer A Input (Two-phase Pulse Input in Event Counter Mode)
Symbol
Parameter
tc(TA)
TAiIN input cycle time
tsu(TAIN-TAOUT)
tsu(TAOUT-TAIN)
TAiOUT input setup time
TAiIN input setup time
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 382 of 458
Standard
Min.
Max.
2
500
500
Unit
µs
ns
ns
M16C/29 Group
21. Electrical Characteristics (Normal-version)
VCC = 3V
Timing Requirements
(VCC = 3V, VSS = 0V, at Topr = – 20 to 85oC / – 40 to 85oC unless otherwise specified)
Table 21.33 Timer B Input (Counter Input in Event Counter Mode)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc(TB)
TBiIN input cycle time (counted on one edge)
150
ns
tw(TBH)
TBiIN input HIGH pulse width (counted on one edge)
60
ns
tw(TBL)
TBiIN input LOW pulse width (counted on one edge)
TBiIN input cycle time (counted on both edges)
60
300
ns
tc(TB)
tw(TBH)
TBiIN input HIGH pulse width (counted on both edges)
120
ns
tw(TBL)
TBiIN input LOW pulse width (counted on both edges)
120
ns
ns
Table 21.34 Timer B Input (Pulse Period Measurement Mode)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc(TB)
TBiIN input cycle time
600
ns
tw(TBH)
tw(TBL)
TBiIN input HIGH pulse width
TBiIN input LOW pulse width
300
300
ns
ns
Table 21.35 Timer B Input (Pulse Width Measurement Mode)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc(TB)
TBiIN input cycle time
600
tw(TBH)
TBiIN input HIGH pulse width
300
ns
300
ns
tw(TBL)
TBiIN input LOW pulse width
ns
Table 21.36 A/D Trigger Input
Symbol
tc(AD)
tw(ADL)
Parameter
ADTRG input cycle time (trigger able minimum)
ADTRG input LOW pulse width
Standard
Min.
1500
200
Max.
Unit
ns
ns
Table 21.37 Serial I/O
Symbol
tc(CK)
tw(CKH)
tw(CKL)
td(C-Q)
th(C-Q)
tsu(D-C)
th(C-D)
Parameter
Standard
Min.
Max.
Unit
CLKi input cycle time
300
ns
CLKi input HIGH pulse width
150
ns
CLKi input LOW pulse width
150
ns
160
TxDi output delay time
TxDi hold time
RxDi input setup time
RxDi input hold time
ns
0
ns
100
90
ns
ns
_______
Table 21.38 External Interrupt INTi Input
Symbol
Parameter
Standard
Min.
Max.
Unit
tw(INH)
INTi input HIGH pulse width
380
ns
tw(INL)
INTi input LOW pulse width
380
ns
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 383 of 458
21. Electrical Characteristics (Normal-version)
M16C/29 Group
VCC = 3V
Timing Requirements
(VCC = 3V, VSS = 0V, at Topr = – 20 to 85oC / – 40 to 85oC unless otherwise specified)
Table 21.39 Multi-master I2C bus Line
Symbol
Parameter
Standard clock mode
Min.
Max.
High-speed clock mode
Min.
Max.
Unit
tBUF
Bus free time
4.7
1.3
µs
tHD;STA
The hold time in start condition
0.6
µs
tLOW
The hold time in SCL clock 0 status
4.0
4.7
tR
SCL, SDA signals' rising time
tHD;DAT
Data hold time
tHIGH
The hold time in SCL clock 1 status
1000
0
1.3
20+0.1Cb
0
4.0
0.6
20+0.1Cb
µs
300
ns
0.9
µs
µs
tF
SCL, SDA signals' falling time
tSU;DAT
Data setup time
250
100
ns
tSU;STA
The setup time in restart condition
4.7
0.6
tSU;STO
µs
Stop condition setup time
4.0
0.6
µs
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 384 of 458
300
300
ns
M16C/29 Group
21. Electrical Characteristics (Normal-version)
VCC = 3V
XIN input
tf
tw(H)
tr
tw(L)
tc
tc(TA)
tw(TAH)
TAiIN input
tw(TAL)
tc(UP)
tw(UPH)
TAiOUT input
tw(UPL)
TAiOUT input
(Up/down input)
During Event Counter Mode
TAiIN input
(When count on falling
edge is selected)
TAiIN input
(When count on rising
edge is selected)
th(TIN-UP) tsu(UP-TIN)
Two-Phase Pulse Input in Event Counter Mode
tc(TA)
TAiIN input
tsu(TAIN-TAOUT)
tsu(TAIN-TAOUT)
tsu(TAOUT-TAIN)
TAiOUT input
tsu(TAOUT-TAIN)
tc(TB)
tw(TBH)
TBiIN input
tw(TBL)
tc(AD)
tw(ADL)
ADTRG input
Figure 21.4 Timing Diagram (1)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 385 of 458
21. Electrical Characteristics (Normal-version)
M16C/29 Group
VCC = 3V
tc(CK)
tw(CKH)
CLKi
tw(CKL)
th(C–Q)
TxDi
td(C–Q)
tsu(D–C)
RxDi
th(C–D)
tw(INL)
INTi input
tw(INH)
Figure 21.5 Timing Diagram (2)
VCC = 3V
SDA
tHD:STA
tBUF
tLOW
SCL
p
tR
tF
Sr
S
tHD:STA
tHD:DTA
Figure 21.6 Timing Diagram (3)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 386 of 458
tsu:STO
tHIGH
tsu:DAT
tsu:STA
p
21. Electrical Characteristics (T-version)
M16C/29 Group
21.2 T version
Table 21.40 Absolute Maximum Ratings
Symbol
VCC
Parameter
Supply Voltage
AVCC
Analog Supply Voltage
VI
Input Voltage
VO
Condition
Value
Unit
VCC=AVCC
-0.3 to 6.5
V
VCC=AVCC
-0.3 to 6.5
V
-0.3 to VCC+0.3
V
-0.3 to VCC+0.3
V
300
mW
P00 to P07, P10 to P17, P20 to P27,
P30 to P37, P60 to P67, P70 to P77,
P80 to P87, P90 to P93, P95 to P97,
P100 to P107,
XIN, VREF, RESET, CNVSS
Output Voltage P00 to P07, P10 to P17, P20 to P27,
P30 to P37, P60 to P67, P70 to P77,
P80 to P87, P90 to P93, P95 to P97,
P100 to P107,
XOUT
Pd
-40<Topr<85° C
Power Dissipation
during CPU operation
Topr
Tstg
Operating
Ambient
Temperature
during flash memory
program and erase
operation
Storage Temperature
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 387 of 458
-40 to 85
°C
Program Space
(Block 0 to Block 5)
0 to 60
°C
Data Space
(Block A, Block B)
-40 to 85
°C
-65 to 150
°C
21. Electrical Characteristics (T-version)
M16C/29 Group
Table 21.41 Recommended Operating Conditions (Note 1)
Symbol
Standard
Parameter
Min.
3.0
Typ.
Max.
5. 5
Unit
VCC
AVCC
Supply Voltage
Analog Supply Voltage
VSS
Supply Voltage
0
V
AVSS
Analog Supply Voltage
0
V
VIH
Input High ("H")
Voltage
VCC
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
0.7VCC
P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
0.8VCC
XIN, RESET, CNVSS
VIL
Input Low ("L")
Voltage
f(XIN)
f(XCIN)
Sub Clock Oscillation Frequency
IOH(avg)
IOL(peak)
IOL(avg)
V
VCC
V
VCC
VCC
0.3VCC
V
V
V
0
0.2VCC
V
0
0
0.3VCC
0.6
-10.0
V
V
mA
-5.0
mA
10.0
mA
5.0
mA
20
MHz
50
kHz
When
bus input level is selected
0.7VCC
When SMBUS input level is selected
1.4
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
0
P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
XIN, RESET, CNVSS
When I2C bus input level is selected
SDAMM, SCLMM
When SMBUS input level is selected
Peak Output High P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
("H") Current
P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Average Output
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
High ("H") Current P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Peak Output Low P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
("L") Current
P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Average Output
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
Low ("L") Current P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Main Clock Input Oscillation Frequency(4)
IOH(peak)
VCC
I2C
SDAMM, SCLMM
V
V
0
32.768
f1(ROC) On-chip Oscillator Frequency 1
0.5
1
2
MHz
f2(ROC) On-chip Oscillator Frequency 2
1
2
4
MHz
8
16
f3(ROC) On-chip Oscillator Frequency 3
f(PLL)
PLL Clock Oscillation Frequency(4)
MHz
20
MHz
0
20
MHz
VCC=5.0V
20
ms
VCC=3.0V
50
ms
f(BCLK) CPU Operation Clock Frequency
tSU(PLL) Wait Time to Stabilize PLL Frequency Synthesizer
26
10
NOTES:
1. Referenced to VCC = 3.0 to 5.5V at Topr = -40 to 85 ° C unless otherwise specified.
2. The mean output current is the mean value within 100ms.
3. The total IOL(peak) for all ports must be 80mA or less. The total IOH(peak) for all ports must be -80mA or less.
4. Relationship among main clock oscillation frequency, PLL clock oscillation frequency and supply voltage.
20.0 MHZ
20.0
10.0
0.0
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
3.0
VCC[V] (main clock: no division)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 388 of 458
5.5
PLL clock oscillation frequency
f(PLL) operating maximum frequency [MHZ]
f(XIN) operating maximum frequency [MHZ]
Main clock input oscillation frequency
AAAA
AAAA
AAAA
AAAA
20.0 MHZ
20.0
10.0
0.0
3.0
VCC[V] (PLL clock oscillation)
5.5
21. Electrical Characteristics (T-version)
M16C/29 Group
Table 21.42 A/D Conversion Characteristics (Note 1)
Symbol
-
Parameter
Resolution
Integral Nonlinearity
Error
INL
Measurement Condition
10 bit
8 bit
-
Absolute Accuracy
10 bit
8 bit
DNL
Standard
Min.
Typ.
Max.
Unit
VREF = VCC
10
Bits
VREF = VCC = 5 V
±3
LSB
VREF = VCC = 3.3 V
±5
LSB
VREF = VCC = 3.3 V
±2
LSB
VREF = VCC = 5 V
±3
LSB
VREF = VCC = 3.3 V
±5
LSB
VREF = VCC = 3.3 V
±2
LSB
±1
LSB
Differential Nonlinearity Error
-
Offset Error
±3
LSB
-
Gain Error
±3
LSB
40
kΩ
RLADDER
Resistor Ladder
VREF = VCC
10
tCONV
10-bit Conversion Time
Sample & Hold Function Available
VREF = VCC=5 V, øAD = 10 MHz
3.3
µs
tCONV
8-bit Conversion Time
Sample & Hold Function Available
VREF = VCC = 5 V, øAD = 10 MHz
2.8
µs
VREF
Reference Voltage
VIA
Analog Input Voltage
2.0
VCC
V
0
VREF
V
NOTES:
1. Referenced to VCC = AVCC = VREF= 3.3 to 5.5 V, VSS = AVSS= 0 V at Topr = -40 to 85° C unless otherwise
specified.
2. Keep φAD frequency at 10 MHz or less. Additionally, divide the fAD if VCC is less than 4.2 V, and make φAD
frequency equal to or lower than fAD/2.
3. When sample & hold function is disabled, keep φAD frequency at 250 kHz or more in addition to the limitation in Note 2.
When sample & hold function is enabled, keep φAD frequency at 1 MHz or more in addition to the limitation in Note 2.
4. When sample & hold function is enabled, sampling time is 3/ φAD frequency.
When sample & hold function is disabled, sampling time is 2/ φAD frequency.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 389 of 458
21. Electrical Characteristics (T-version)
M16C/29 Group
Table 21.43 Flash Memory Version Electrical Characteristics (1) for 100/1000 E/W cycle products
[Program Space and Data Space in U3; Program Space in U7]
Symbol
Standard
Parameter
-
Program and Erase Endurance(3)
-
Word Program Time (VCC = 5.0 V, Topr = 25° C)
-
Block Erase Time
(VCC = 5.0 V, Topr = 25° C)
Min.
Typ.(2)
(
4
,
1
100/1000 1)
75
Max.
Unit
cycles
600
0.2
9
2-Kbyte Block
0.4
9
8-Kbyte Block
0.7
9
16-Kbyte Block
1.2
9
32-Kbyte Block
td(SR-ES) Duration between Suspend Request and Erase Suspend
8
Wait Time to Stabilize Flash Memory Circuit
15
tPS
20
Data Hold Time (5)
Table 21.44 Flash Memory Version Electrical Characteristics (6) for 10000 E/W cycle products
µs
s
s
s
s
ms
µs
years
[Data Space in U7(7)]
Symbol
Standard
Parameter
Min.
Typ.(2)
(
4
,
1
0
)
10000
Max.
Unit
-
Program and Erase Endurance(3, 8, 9)
-
Word Program Time (VCC = 5.0 V, Topr = 25° C)
100
µs
-
Block Erase Time (VCC = 5.0V, Topr = 25° C)
(2-Kbyte block)
Duration between Suspend Request and Erase Suspend
Wait Time to Stabilize Flash Memory Circuit
Data Hold Time (5)
0.3
s
cycles
td(SR-ES)
8
ms
µs
15
tPS
20
years
NOTES:
1. Referenced to VCC = 3.0 to 5.5 V at Topr = 0 to 60° C (program space)/ Topr = -40 to 85° C(data space), unless
otherwise specified.
2. VCC = 5.0 V; TOPR = 25° C
3. Program and erase endurance is defined as number of program-erase cycles per block.
If program and erase endurance is n cycle (n = 100, 1000, 10000), each block can be erased and programmed n
cycles.
For example, if a 2-Kbyte block A is erased after programming one-word data to each address 1,024 times,
this counts as one program and erase endurance. Data cannot be programmed to the same address more than
once without erasing the block. (rewrite prohibited).
4. Number of E/W cycles for which operation is guranteed (1 to minimum value are guranteed).
5. Topr = 55° C
6. Referenced to VCC = 3.0 to 5.5 V at Topr = -40 to 85° C unless otherwise specified.
7. Table 21.44 applies for data space in U7 when program and erase endurance is more than 1,000 cycles.
Otherwise, use Table 21.43.
8. To reduce the number of program and erase endurance when working with systems requiring numerous rewrites,
write to unused word addresses within the block instead of rewrite. Erase block only after all possible addresses
are used. For example, an 8-word program can be written 128 times maximum before erase becomes necessary.
Maintaining an equal number of times erasure between block A and block B will also improve efficiency. It is
recommended to track the total number of erasure performed per block and to limit the number of erasure.
9. If an erase error is generated during block erase, execute the clear status register command and block erase
command at least 3 times until an erase error is not generated.
10. When executing more than 100 times rewrites, set one wait state per block access by setting the FMR17 bit in
the FMR1 register to 1 (wait state). When accessing to all other blocks and internal RAM, wait state can be set
by the PM17 bit, regardless of the FMR17 bit setting value.
11. The program and erase endurance is 100 cycles for program space and data space in U3; 1,000 cycles
for program space in U7.
12. Please contact Renesas Technology Corp. or an authorized Renesas Technology Corp. product distributor for
further details on the E/W failure rate.
Erase suspend
request
(interrupt request)
FMR46
td(SR-ES)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 390 of 458
21. Electrical Characteristics (T-version)
M16C/29 Group
Table 21.45 Power Supply Circuit Timing Characteristics
Symbol
Parameter
Measurement Condition
td(P-R)
Wait Time to Stabilize Internal Supply Voltage when
Power-on
td(ROC)
Wait Time to Stabilize Internal On-chip Oscillator when
Power-on
td(R-S)
td(W-S)
Standard
Min.
Typ.
Max.
Unit
2
ms
40
µs
STOP Release Time(1)
150
µs
Low Power Dissipation Mode Wait Mode Release
Time
150
µs
td(P-R)
Wait time to stabilize internal
supply voltage when power-on
VCC
ROC
td(ROC)
Wait time to stabilize internal
on-chip oscillator when poweron
td(P-R)
td(ROC)
RESET
Interrupt for
(a) Stop mode release
or
(b) Wait mode release
td(R-S)
STOP release time
td(W-S)
VCC = 3.0 to 5.5V
Low power dissipation mode
wait mode release time
CPU clock
(a)
(b)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 391 of 458
td(R-S)
td(W-S)
21. Electrical Characteristics (T-version)
M16C/29 Group
VCC = 5V
Table 21.46 Electrical Characteristics (Note 1)
Symbol
VOH
VOH
Parameter
Output High P00 to
("H") Voltage P70 to
Output High P00 to
("H") Voltage P70 to
P07,
P77,
P07,
P77,
P10 to
P80 to
P10 to
P80 to
P17,
P87,
P17,
P87,
P20 to
P90 to
P20 to
P90 to
Condition
XOUT
Output High ("H") Voltage
XCOUT
VOH
VOL
VOL
Output Low P00 to
("L") Voltage P70 to
Output Low P00 to
("L") Voltage P70 to
IOH = -5 mA
Typ. Max.
VCC
VCC-2.0
IOH = -200 µA
VCC-0.3
VCC
High Power
IOH = -1 mA
VCC-2.0
VCC
Low Power
IOH = -0.5 mA
VCC-2.0
VCC
High Power
No load applied
2.5
Low Power
No load applied
1.6
P27,
P93,
P27,
P93,
Output High ("H") Voltage
Standard
P30 to
P95 to
P30 to
P95 to
P37,
P97,
P37,
P97,
P60 to P67,
P100 to P107
P60 to P67,
P100 to P107
Min.
Unit
V
V
V
V
P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
IOL = 5 mA
2.0
V
P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
IOL = 200 µA
0.45
V
High Power
IOL = 1 mA
2.0
Low Power
IOL = 0.5 mA
2.0
High Power
No load applied
0
Low Power
No load applied
0
P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Output Low ("L") Voltage
XOUT
Output Low ("L") Voltage
XCOUT
VOL
V
V
VT+-VT- Hysteresis
TA0IN-TA4IN, TB0IN-TB2IN, INT0-INT5, NMI, ADTRG, CTS0CTS2, SCL, SDA, CLK0-CLK2, TA2OUT-TA4OUT, KI0-KI3, RXD0RXD2, SIN3, SIN4
0.2
1.0
V
VT+-VT- Hysteresis
RESET
0.2
2.5
V
VT+-VT- Hysteresis
XIN
IIH
IIL
Input High
P00 to P07, P10 to P17,
("H") Current P70 to P77, P80 to P87,
XIN, RESET, CNVSS
Input Low
P00 to P07, P10 to P17,
("L") Current P70 to P77, P80 to P87,
RPULLUP Pull-up
Resistance
0.2
P20 to P27, P30 to P37, P60 to P67,
P20 to P27, P30 to P37, P60 to P67,
P90 to P93, P95 to P97, P100 to P107
XIN, RESET, CNVSS
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Feedback Resistance
XIN
RfXCIN
Feedback Resistance
XCIN
RAM Standby Voltage
V
5.0
µA
VI = 0 V
-5.0
µA
170
kΩ
P90 to P93, P95 to P97, P100 to P107
RfXIN
VRAM
0.8
VI = 5 V
VI = 0 V
In stop mode
30
50
1.5
MΩ
15
MΩ
2.0
NOTES:
1. Referenced to VCC=4.2 to 5.5V, VSS=0V at Topr=-40 to 85 ° C, f(BCLK)=20MHz unless otherwise specified.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 392 of 458
V
21. Electrical Characteristics (T-version)
M16C/29 Group
VCC = 5V
Table 21.47 Electrical Characteristics (2) (Note 1)
Symbol
ICC
Parameter
Measurement Condition
Power Supply
Output pins are Mask ROM
Current
left open and
(VCC=4.2 to 5.5V) other pins are
connected to VSS
Flash memory
Flash memory
program
Flash memory
erase
Mask ROM
Flash memory
Mask ROM,
Flash memory
f(BCLK) = 20 MHz,
main clock, no division
On-chip oscillation, f2(ROC) selected,
f(BCLK) = 1 MHz
f(BCLK) = 20 MHz,
main clock, no division
On-chip oscillation, f2(ROC) selected,
f(BCLK) = 1 MHz
Standard
Min.
Typ.
18
Unit
Max.
25 mA
2
18
mA
25
2
mA
11
mA
f(BCLK) = 10 MHz, Vcc = 5.0 V
11
mA
f(BCLK) = 32 kHz,
In low-power consumption mode,
Program running on ROM(3)
On-chip oscillation,
f2(ROC) selected, f(BCLK) = 1 MHz,
In wait mode
f(BCLK) = 32 kHz,
In low-power consumption mode,
Program running on RAM(3)
f(BCLK) = 32 kHz,
In low-power consumption mode,
Program running on flash memory(3)
On-chip oscillation,
f2(ROC) selected, f(BCLK) = 1 MHz,
In wait mode
f(BCLK) = 32 kHz, In wait mode(2),
Oscillation capacity high
f(BCLK) = 32 kHz, In wait mode(2),
Oscillation capacity low
While clock stops, Topr = 25° C
25
µA
50
µA
25
µA
450
µA
50
µA
8.5
µA
3
µA
f(BCLK) = 10 MHz, Vcc = 5.0 V
0.8
3
NOTES:
1. Referenced to VCC = 4.2 to 5.5 V, VSS = 0 V at Topr = -40 to 85 ° C, f(BCLK) = 20 MHz unless otherwise specified.
2. With one timer operates, using fC32.
3. This indicates the memory in which the program to be executed exists.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 393 of 458
mA
µA
21. Electrical Characteristics (T-version)
M16C/29 Group
VCC = 5V
Timing Requirements
(VCC = 5V, VSS = 0V, at Topr = – 40 to 85oC unless otherwise specified)
Table 21.48 External Clock Input (XIN input)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc
External Clock Input Cycle Time
50
ns
tw(H)
External Clock Input High ("H") Width
20
ns
tw(L)
External Clock Input Low ("L") Width
20
tr
External Clock Rise Time
9
ns
tf
External Clock Fall Time
9
ns
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 394 of 458
ns
21. Electrical Characteristics (T-version)
M16C/29 Group
VCC = 5V
Timing Requirements
(VCC = 5V, VSS = 0V, at Topr = – 40 to 85oC unless otherwise specified)
Table 21.49 Timer A Input (Counter Input in Event Counter Mode)
Symbol
tc(TA)
Parameter
TAiIN input cycle time
Standard
Max.
Min.
100
tw(TAH)
TAiIN input HIGH pulse width
40
tw(TAL)
TAiIN input LOW pulse width
40
Unit
ns
ns
ns
Table 21.50 Timer A Input (Gating Input in Timer Mode)
Symbol
Parameter
tc(TA)
TAiIN input cycle time
tw(TAH)
tw(TAL)
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
Standard
Min.
Max.
400
Unit
ns
200
ns
200
ns
Table 21.51 Timer A Input (External Trigger Input in One-shot Timer Mode)
Symbol
tc(TA)
tw(TAH)
tw(TAL)
Parameter
Standard
Min.
Max.
Unit
TAiIN input cycle time
200
ns
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
100
ns
100
ns
Table 21.52 Timer A Input (External Trigger Input in Pulse Width Modulation Mode)
Symbol
tw(TAH)
tw(TAL)
Parameter
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
Standard
Max.
Min.
100
100
Unit
ns
ns
Table 21.53 Timer A Input (Counter Increment/decrement Input in Event Counter Mode)
tc(UP)
TAiOUT input cycle time
tw(UPH)
TAiOUT input HIGH pulse width
Standard
Min.
Max.
2000
1000
TAiOUT input LOW pulse width
TAiOUT input setup time
TAiOUT input hold time
1000
400
400
Symbol
tw(UPL)
tsu(UP-TIN)
th(TIN-UP)
Parameter
Unit
ns
ns
ns
ns
ns
Table 21.54 Timer A Input (Two-phase Pulse Input in Event Counter Mode)
Symbol
tc(TA)
Parameter
TAiIN input cycle time
tsu(TAIN-TAOUT)
TAiOUT input setup time
tsu(TAOUT-TAIN)
TAiIN input setup time
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 395 of 458
Standard
Min.
Max.
800
200
200
Unit
ns
ns
ns
21. Electrical Characteristics (T-version)
M16C/29 Group
VCC = 5V
Timing Requirements
(VCC = 5V, VSS = 0V, at Topr = – 40 to 85oC unless otherwise specified)
Table 21.55 Timer B Input (Counter Input in Event Counter Mode)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc(TB)
TBiIN input cycle time (counted on one edge)
100
ns
tw(TBH)
TBiIN input HIGH pulse width (counted on one edge)
40
ns
tw(TBL)
TBiIN input LOW pulse width (counted on one edge)
TBiIN input cycle time (counted on both edges)
40
200
ns
tc(TB)
tw(TBH)
TBiIN input HIGH pulse width (counted on both edges)
80
ns
tw(TBL)
TBiIN input LOW pulse width (counted on both edges)
80
ns
ns
Table 21.56 Timer B Input (Pulse Period Measurement Mode)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc(TB)
TBiIN input cycle time
400
ns
tw(TBH)
tw(TBL)
TBiIN input HIGH pulse width
TBiIN input LOW pulse width
200
200
ns
ns
Table 21.57 Timer B Input (Pulse Width Measurement Mode)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc(TB)
TBiIN input cycle time
400
tw(TBH)
TBiIN input HIGH pulse width
200
ns
200
ns
tw(TBL)
TBiIN input LOW pulse width
ns
Table 21.58 A/D Trigger Input
Symbol
tc(AD)
tw(ADL)
Parameter
ADTRG input cycle time (trigger able minimum)
ADTRG input LOW pulse width
Standard
Min.
1000
125
Max.
Unit
ns
ns
Table 21.59 Serial I/O
Symbol
tc(CK)
tw(CKH)
tw(CKL)
td(C-Q)
th(C-Q)
tsu(D-C)
th(C-D)
Parameter
Standard
Min.
Max.
Unit
CLKi input cycle time
200
ns
CLKi input HIGH pulse width
100
ns
CLKi input LOW pulse width
100
ns
80
TxDi output delay time
TxDi hold time
RxDi input setup time
RxDi input hold time
ns
0
ns
70
90
ns
ns
_______
Table 21.60 External Interrupt INTi Input
Symbol
Parameter
Standard
Min.
Max.
Unit
tw(INH)
INTi input HIGH pulse width
250
ns
tw(INL)
INTi input LOW pulse width
250
ns
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 396 of 458
21. Electrical Characteristics (T-version)
M16C/29 Group
VCC = 5V
Timing Requirements
(VCC = 5V, VSS = 0V, at Topr = – 40 to 85oC unless otherwise specified)
Table 21.61 Multi-master I2C bus Line
Symbol
Parameter
Standard clock mode
Min.
Max.
High-speed clock mode
Min.
Max.
Unit
tBUF
Bus free time
4.7
1.3
µs
tHD;STA
The hold time in start condition
4.0
4.7
0.6
µs
tLOW
The hold time in SCL clock 0 status
tR
SCL, SDA signals' rising time
tHD;DAT
Data hold time
tHIGH
The hold time in SCL clock 1 status
1000
0
1.3
20+0.1Cb
0
4.0
0.6
20+0.1Cb
µs
300
ns
0.9
µs
µs
tF
SCL, SDA signals' falling time
tSU;DAT
Data setup time
250
100
ns
tSU;STA
The setup time in restart condition
4.7
0.6
tSU;STO
µs
Stop condition setup time
4.0
0.6
µs
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 397 of 458
300
300
ns
21. Electrical Characteristics (T-version)
M16C/29 Group
VCC = 5V
XIN input
tf
tw(H)
tr
tw(L)
tc
tc(TA)
tw(TAH)
TAiIN input
tw(TAL)
tc(UP)
tw(UPH)
TAiOUT input
tw(UPL)
TAiOUT input
(Up/down input)
During Event Counter Mode
TAiIN input
(When count on falling
edge is selected)
TAiIN input
(When count on rising
edge is selected)
th(TIN-UP) tsu(UP-TIN)
Two-Phase Pulse Input in Event Counter Mode
tc(TA)
TAiIN input
tsu(TAIN-TAOUT)
tsu(TAIN-TAOUT)
tsu(TAOUT-TAIN)
TAiOUT input
tsu(TAOUT-TAIN)
tc(TB)
tw(TBH)
TBiIN input
tw(TBL)
tc(AD)
tw(ADL)
ADTRG input
Figure 21.7 Timing Diagram (1)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 398 of 458
21. Electrical Characteristics (T-version)
M16C/29 Group
VCC = 5V
tc(CK)
tw(CKH)
CLKi
tw(CKL)
th(C–Q)
TxDi
td(C–Q)
tsu(D–C)
RxDi
th(C–D)
tw(INL)
INTi input
tw(INH)
Figure 21.8 Timing Diagram (2)
VCC = 5V
SDA
tHD:STA
tBUF
tLOW
SCL
p
tR
tF
Sr
S
tHD:STA
tHD:DTA
Figure 21.9 Timing Diagram (3)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 399 of 458
tsu:STO
tHIGH
tsu:DAT
tsu:STA
p
21. Electrical Characteristics (T-version)
M16C/29 Group
VCC = 3V
Table 21.62 Electrical Characteristics (Note)
Symbol
VOH
Parameter
Output High ("H") Voltage
XOUT
Output High ("H") Voltage
XCOUT
IOH = -1 mA
High Power
IOH = -0.1 mA
VCC-0.5
VCC
Low Power
IOH = -50 µA
VCC-0.5
VCC
High Power
No load applied
2.5
Low Power
No load applied
1.6
Output Low P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
("L") Voltage P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Output Low ("L") Voltage
XOUT
Output Low ("L") Voltage
XCOUT
VOL
Standard
Typ. Max.
VCC
VCC-0.5
Output High P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
("H") Voltage P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
VOH
VOL
Condition
Min.
Unit
V
V
V
IOL = 1 mA
0.5
High Power
IOL = 0.1 mA
0. 5
Low Power
IOL = 50 µA
0.5
High Power
No load applied
0
Low Power
No load applied
0
V
V
V
VT+-VT- Hysteresis
TA0IN-TA4IN, TB0IN-TB2IN, INT0-INT5, NMI, ADTRG, CTS0CTS2, SCL, SDA, CLK0-CLK2, TA2OUT-TA4OUT, KI0-KI3, RXD0RXD2, SIN3, SIN4
VT+-VT- Hysteresis
RESET
1.8
V
VT+-VT- Hysteresis
XIN
0.8
V
IIH
IIL
RPULLUP
Input High
P00 to P07, P10 to P17,
("H") Current P70 to P77, P80 to P87,
XIN, RESET, CNVSS
Input Low
P00 to P07, P10 to P17,
("L") Current P70 to P77, P80 to P87,
XIN, RESET, CNVSS
Pull-up
P00 to P07, P10 to P17,
Resistance P70 to P77, P80 to P87,
0.8
V
P20 to P27, P30 to P37, P60 to P67,
P90 to P93, P95 to P97, P100 to P107
VI = 3 V
4.0
µA
P20 to P27, P30 to P37, P60 to P67,
P90 to P93, P95 to P97, P100 to P107
VI = 0 V
-4.0
µA
P20 to P27, P30 to P37, P60 to P67,
P90 to P93, P95 to P97, P100 to P107
VI = 0 V
100 500
kΩ
50
RfXIN
Feedback Resistance
XIN
3.0
MΩ
RfXCIN
Feedback Resistance
XCIN
25
MΩ
VRAM
RAM Standby Voltage
In stop mode
2.0
NOTE:
1. Referenced to VCC = 3.0 to 3.6 V, VSS = 0 V at Topr = -40 to 85 ° C, f(BCLK) = 20 MHz unless otherwise specified.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 400 of 458
V
21. Electrical Characteristics (T-version)
M16C/29 Group
VCC = 3V
Table 21.63 Electrical Characteristics (2) (Note 1)
Symbol
ICC
Parameter
Measurement Condition
Power Supply
Output pins are Mask ROM
Current
left open and
(VCC=3.0 to 3.6V) other pins are
connected to VSS
Flash memory
Flash memory
program
Flash memory
erase
Mask ROM
Flash memory
Mask ROM,
Flash memory
f(BCLK) = 10 MHz,
main clock, no division
On-chip oscillation,
f2(ROC) selected, f(BCLK) = 1 MHz
f(BCLK) = 10 MHz,
main clock, no division
Standard
Min.
Typ.
8
Unit
Max.
13 mA
1
8
mA
13
11
mA
f(BCLK) = 10MHz, Vcc = 3.0 V
11
mA
f(BCLK) = 32 kHz,
In low-power consumption mode,
Program running on ROM(3)
On-chip oscillation,
f2(ROC) selected, f(BCLK) = 1 MHz,
In wait mode
f(BCLK) = 32 kHz,
In low-power consumption mode,
Program running on RAM(3)
f(BCLK) = 32 kHz,
In low-power consumption mode,
Program running on flash memory(3)
On-chip oscillation,
f2(ROC) selected, f(BCLK) = 1 MHz,
In wait mode
f(BCLK) = 32 kHz, In wait mode(2),
Oscillation capacity high
f(BCLK) = 32 kHz, In wait mode(2),
Oscillation capacity low
While clock stops, Topr = 25° C
20
µA
25
µA
20
µA
450
µA
45
µA
6.6
µA
2.2
µA
f(BCLK) = 10 MHz, Vcc = 3.0 V
0.7
3
NOTES:
1. Referenced to VCC = 3.0 to 3.6 V, VSS = 0 V at Topr = -40 to 85 ° C, f(BCLK) = 20 MHz unless otherwise specified.
2. With one timer operates, using fC32.
3. This indicates the memory in which the program to be executed exists.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 401 of 458
mA
µA
21. Electrical Characteristics (T-version)
M16C/29 Group
VCC = 3V
Timing Requirements
(VCC = 3V, VSS = 0V, at Topr = – 40 to 85oC unless otherwise specified)
Table 21.64 External Clock Input (XIN input)
Symbol
tc
tw(H)
tw(L)
tr
tf
Parameter
External clock input cycle time
External clock input HIGH pulse width
External clock input LOW pulse width
External clock rise time
External clock fall time
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 402 of 458
Standard
Min.
Max.
100
40
40
18
18
Unit
ns
ns
ns
ns
ns
21. Electrical Characteristics (T-version)
M16C/29 Group
VCC = 3V
Timing Requirements
(VCC = 3V, VSS = 0V, at Topr = – 40 to 85oC unless otherwise specified)
Table 21.65 Timer A Input (Counter Input in Event Counter Mode)
Symbol
Parameter
tc(TA)
TAiIN input cycle time
tw(TAH)
TAiIN input HIGH pulse width
tw(TAL)
TAiIN input LOW pulse width
Standard
Max.
Min.
150
60
60
Unit
ns
ns
ns
Table 21.66 Timer A Input (Gating Input in Timer Mode)
Symbol
tc(TA)
tw(TAH)
tw(TAL)
Parameter
TAiIN input cycle time
Standard
Min.
Max.
600
300
300
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
Unit
ns
ns
ns
Table 21.67 Timer A Input (External Trigger Input in One-shot Timer Mode)
Symbol
tc(TA)
tw(TAH)
tw(TAL)
Parameter
Standard
Min.
Max.
Unit
TAiIN input cycle time
300
ns
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
150
150
ns
ns
Table 21.68 Timer A Input (External Trigger Input in Pulse Width Modulation Mode)
Symbol
tw(TAH)
tw(TAL)
Parameter
TAiIN input HIGH pulse width
TAiIN input LOW pulse width
Standard
Max.
Min.
150
150
Unit
ns
ns
Table 21.69 Timer A Input (Counter Increment/decrement Input in Event Counter Mode)
tc(UP)
TAiOUT input cycle time
tw(UPH)
tw(UPL)
tsu(UP-TIN)
th(TIN-UP)
TAiOUT input HIGH pulse width
Standard
Min.
Max.
3000
1500
TAiOUT input LOW pulse width
TAiOUT input setup time
TAiOUT input hold time
1500
600
600
Symbol
Parameter
Unit
ns
ns
ns
ns
ns
Table 21.70 Timer A Input (Two-phase Pulse Input in Event Counter Mode)
Symbol
Parameter
tc(TA)
TAiIN input cycle time
tsu(TAIN-TAOUT)
tsu(TAOUT-TAIN)
TAiOUT input setup time
TAiIN input setup time
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 403 of 458
Standard
Min.
Max.
2
500
500
Unit
µs
ns
ns
21. Electrical Characteristics (T-version)
M16C/29 Group
VCC = 3V
Timing Requirements
(VCC = 3V, VSS = 0V, at Topr = – 40 to 85oC unless otherwise specified)
Table 21.71 Timer B Input (Counter Input in Event Counter Mode)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc(TB)
TBiIN input cycle time (counted on one edge)
150
ns
tw(TBH)
TBiIN input HIGH pulse width (counted on one edge)
60
ns
tw(TBL)
TBiIN input LOW pulse width (counted on one edge)
TBiIN input cycle time (counted on both edges)
60
300
ns
tc(TB)
tw(TBH)
TBiIN input HIGH pulse width (counted on both edges)
120
ns
tw(TBL)
TBiIN input LOW pulse width (counted on both edges)
120
ns
ns
Table 21.72 Timer B Input (Pulse Period Measurement Mode)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc(TB)
TBiIN input cycle time
600
ns
tw(TBH)
tw(TBL)
TBiIN input HIGH pulse width
TBiIN input LOW pulse width
300
300
ns
ns
Table 21.73 Timer B Input (Pulse Width Measurement Mode)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc(TB)
TBiIN input cycle time
600
ns
tw(TBH)
TBiIN input HIGH pulse width
300
ns
tw(TBL)
TBiIN input LOW pulse width
300
ns
Table 21.74 A/D Trigger Input
Symbol
tc(AD)
tw(ADL)
Parameter
ADTRG input cycle time (trigger able minimum)
ADTRG input LOW pulse width
Standard
Min.
1500
200
Max.
Unit
ns
ns
Table 21.75 Serial I/O
Symbol
tc(CK)
tw(CKH)
tw(CKL)
td(C-Q)
th(C-Q)
tsu(D-C)
th(C-D)
Parameter
Standard
Min.
Max.
Unit
CLKi input cycle time
300
ns
CLKi input HIGH pulse width
150
ns
CLKi input LOW pulse width
150
ns
160
TxDi output delay time
TxDi hold time
RxDi input setup time
RxDi input hold time
ns
0
ns
100
90
ns
ns
_______
Table 21.76 External Interrupt INTi Input
Symbol
Parameter
tw(INH)
INTi input HIGH pulse width
tw(INL)
INTi input LOW pulse width
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 404 of 458
Standard
Min.
380
380
Max.
Unit
ns
ns
21. Electrical Characteristics (T-version)
M16C/29 Group
VCC = 3V
Timing Requirements
(VCC = 3V, VSS = 0V, at Topr = – 40 to 85oC unless otherwise specified)
Table 21.77 Multi-master I2C bus Line
Symbol
Parameter
Standard clock mode
Min.
Max.
High-speed clock mode
Min.
Max.
Unit
tBUF
Bus free time
4.7
1.3
µs
tHD;STA
The hold time in start condition
µs
The hold time in SCL clock 0 status
4.0
4.7
0.6
tLOW
tR
SCL, SDA signals' rising time
tHD;DAT
Data hold time
tHIGH
The hold time in SCL clock 1 status
tF
SCL, SDA signals' falling time
1000
0
1.3
20+0.1Cb
0
4.0
300
0.6
20+0.1Cb
µs
300
ns
0.9
µs
300
ns
µs
tSU;DAT
Data setup time
250
100
ns
tSU;STA
The setup time in restart condition
4.7
0.6
tSU;STO
µs
Stop condition setup time
4.0
0.6
µs
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 405 of 458
21. Electrical Characteristics (T-version)
M16C/29 Group
VCC = 3V
XIN input
tf
tw(H)
tr
tw(L)
tc
tc(TA)
tw(TAH)
TAiIN input
tw(TAL)
tc(UP)
tw(UPH)
TAiOUT input
tw(UPL)
TAiOUT input
(Up/down input)
During Event Counter Mode
TAiIN input
(When count on falling
edge is selected)
TAiIN input
(When count on rising
edge is selected)
th(TIN-UP) tsu(UP-TIN)
Two-Phase Pulse Input in Event Counter Mode
tc(TA)
TAiIN input
tsu(TAIN-TAOUT)
tsu(TAIN-TAOUT)
tsu(TAOUT-TAIN)
TAiOUT input
tsu(TAOUT-TAIN)
tc(TB)
tw(TBH)
TBiIN input
tw(TBL)
tc(AD)
tw(ADL)
ADTRG input
Figure 21.10 Timing Diagram (1)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 406 of 458
21. Electrical Characteristics (T-version)
M16C/29 Group
VCC = 3V
tc(CK)
tw(CKH)
CLKi
tw(CKL)
th(C–Q)
TxDi
td(C–Q)
tsu(D–C)
RxDi
th(C–D)
tw(INL)
INTi input
tw(INH)
Figure 21.11 Timing Diagram (2)
VCC = 3V
SDA
tHD:STA
tBUF
tLOW
SCL
p
tR
tF
Sr
S
tHD:STA
tHD:DTA
Figure 21.12 Timing Diagram (3)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 407 of 458
tsu:STO
tHIGH
tsu:DAT
tsu:STA
p
21. Electrical Characteristics (V-version)
M16C/29 Group
21.3 V Version
Table 21.78 Absolute Maximum Ratings
Symbol
Parameter
Condition
Value
Unit
VCC
Supply Voltage
VCC=AVCC
-0.3 to 6.5
V
AVCC
Analog Supply Voltage
VCC=AVCC
-0.3 to 6.5
V
VI
Input Voltage
-0.3 to VCC+0.3
V
-0.3 to VCC+0.3
V
300
mW
P00 to P07, P10 to P17, P20 to P27,
P30 to P37, P60 to P67, P70 to P77,
P80 to P87, P90 to P93, P95 to P97,
P100 to P107,
XIN, VREF, RESET, CNVSS
VO
Output Voltage P00 to P07, P10 to P17, P20 to P27,
P30 to P37, P60 to P67, P70 to P77,
P80 to P87, P90 to P93, P95 to P97,
P100 to P107,
XOUT
Pd
-40<Topr<85° C
Power Dissipation
85<Topr<125° C
200
mW
-40 to 125
°C
Program Space
(Block 0 to Block 5)
0 to 60
°C
Data Space
(Block A, Block B)
-40 to 125
°C
-65 to 150
°C
during CPU operation
Topr
Tstg
Operating
Ambient
Temperature
during flash memory
program and erase
operation
Storage Temperature
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 408 of 458
21. Electrical Characteristics (V-version)
M16C/29 Group
Table 21.79 Recommended Operating Conditions (1)
Symbol
Standard
Parameter
VCC
AVCC
Supply Voltage
Analog Supply Voltage
Min.
4.2
Typ.
Max.
5.5
VCC
Unit
V
V
VSS
Supply Voltage
0
V
AVSS
Analog Supply Voltage
0
V
VIH
Input High ("H")
Voltage
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
0.7 VCC
VCC
V
0.8 VCC
VCC
V
Input Low ("L")
Voltage
XIN, RESET, CNVSS
When I2C bus input level is selected
SDAMM, SCLMM
When SMBUS input level is selected
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
0.7 VCC
1.4
0
VCC
VCC
0.3VCC
V
V
V
0
0.2VCC
V
0
0
0.3VCC
0.6
-10.0
V
V
mA
-5.0
mA
10.0
mA
5.0
mA
VIL
IOH(peak)
IOH(avg)
IOL(peak)
IOL(avg)
f(XIN)
XIN, RESET, CNVSS
When I2C bus input level is selected
SDAMM, SCLMM
When SMBUS input level is selected
Peak Output High P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
("H") Current
P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Average Output
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
High ("H") Current P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Peak Output Low P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
("L") Current
P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Average Output
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
Low ("L") Current P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
Main Clock Input Oscillation Frequency(4)
Topr = -40 to 105 ° C
Topr = -40 to 125 ° C
f(XCIN)
0
20
MHz
0
16
MHz
32.768
50
kHz
f1(ROC) On-chip Oscillator Frequency 1
Sub Clock Oscillation Frequency
0.5
1
2
MHz
f2(ROC) On-chip Oscillator Frequency 2
1
2
4
MHz
8
16
26
MHz
f3(ROC) On-chip Oscillator Frequency 3
f(PLL)
PLL Clock Oscillation Frequency(4)
f(BCLK) CPU Operation Clock Frequency
tSU(PLL) Wait Time to Stabilize PLL Frequency Synthesizer
Topr = -40 to 105 ° C
10
20
MHz
Topr = -40 to 125 ° C
10
16
MHz
Topr = -40 to 105 ° C
0
20
MHz
Topr = -40 to 125 ° C
0
16
MHz
20
MHz
Vcc = 5.0 V
NOTES:
1. Referenced to VCC = 4.2 to 5.5 V at Topr = -40 to 125 ° C unless otherwise specified.
2. The mean output current is the mean value within 100ms.
3. The total IOL(peak) for all ports must be 80 mA or less. The total IOH(peak) for all ports must be -80 mA or less.
4. Relationship among main clock oscillation frequency, PLL clock oscillation frequency and supply voltage.
20.0 MHz (Topr = -40 C to 105 C)
AAA
AAA
AAA
AAA
AAA
AAA
16.0 MHz (Topr = -40 C to 125 C)
20.0
16.0
10.0
0.0
4.2
VCC[V] (main clock: no division)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 409 of 458
5.5
PLL clock oscillation frequency
f(PLL) operating maximum frequency [MHZ]
f(XIN) operating maximum frequency [MHZ]
Main clock input oscillation frequency
20.0 MHz (Topr = -40 C to 105 C)
AA
AA
AA
AA
16.0 MHz (Topr = -40 C to 125 C)
20.0
16.0
10.0
0.0
4.2
VCC[V] (PLL clock oscillation)
5.5
21. Electrical Characteristics (V-version)
M16C/29 Group
Table 21.80 A/D Conversion Characteristics (1)
Symbol
-
Parameter
Resolution
Integral Nonlinearity
Error
INL
DNL
-
Measurement Condition
Standard
Min.
Typ. Max.
Unit
VREF = VCC
10
Bits
10 bit
VREF = VCC = 5 V
±3
LSB
8 bit
VREF = VCC = 5 V
±2
LSB
10 bit
VREF = VCC = 5 V
±3
LSB
8 bit
VREF = VCC = 5 V
±2
LSB
Differential Nonlinearity Error
±1
LSB
Offset Error
±3
LSB
±3
LSB
40
kΩ
Absolute Accuracy
Gain Error
RLADDER
Resistor Ladder
VREF = VCC
10
tCONV
10-bit Conversion Time
Sample & Hold Function Available
VREF = VCC = 5 V, φAD = 10 MHz
3.3
µs
tCONV
8-bit Conversion Time
Sample & Hold Function Available
VREF = VCC = 5 V, φAD = 10 MHz
2.8
µs
VREF
Reference Voltage
VIA
Analog Input Voltage
2.0
VCC
V
0
VREF
V
NOTES:
1. Referenced to VCC = AVCC = VREF = 4.2 to 5.5 V, VSS = AVSS = 0 V at Topr = -40 to 125 ° C unless otherwise specified.
2. Keep φAD frequency at 10 MHz or less.
3. When sample & hold function is disabled, keep φAD frequency at 250kHz or more in addition to the limitation in Note 2.
When sample & hold function is enabled, keep φAD frequency at 1MHz or more in addition to the limitation in Note 2.
4. When sample & hold function is enabled, sampling time is 3/ φAD frequency.
When sample & hold function is disabled, sampling time is 2/ φAD frequency.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 410 of 458
21. Electrical Characteristics (V-version)
M16C/29 Group
Table 21.81 Flash Memory Version Electrical Characteristics (1) for 100/1000 E/W cycle products
[Program Space and Data Space in U3; Program Space in U7]
Symbol
Standard
Parameter
Min.
Typ.(2)
(
4
,
1
100/1000 1)
Max.
Unit
-
Program and Erase Endurance(3)
-
Word Program Time (VCC = 5.0 V, Topr = 25° C)
75
600
µs
-
Block Erase Time
(VCC = 5.0 V, Topr = 25° C)
0.2
0.4
0.7
1.2
9
9
9
9
8
15
s
s
s
s
ms
µs
td(SR-ES)
tPS
-
2-Kbyte Block
8-Kbyte Block
16-Kbyte Block
32-Kbyte Block
Duration between Suspend Request and Erase Suspend
Wait Time to Stabilize Flash Memory Circuit
Data Hold Time (5)
cycles
20
years
Table 21.82 Flash Memory Version Electrical Characteristics (6) for 10000 E/W cycle products
[Data Space in U7 (7)]
Symbol
Standard
Parameter
Min.
Typ.(2)
(
4
,
1
0
)
10000
Max.
Unit
-
Program and Erase Endurance(3, 8, 9)
-
Word Program Time (VCC = 5.0 V, Topr = 25° C)
100
µs
Block Erase Time (VCC = 5.0V, Topr = 25° C)
(2-Kbyte block)
Duration between Suspend Request and Erase Suspend
Wait Time to Stabilize Flash Memory Circuit
Data Hold Time (5)
0.3
s
-
cycles
td(SR-ES)
8
ms
µs
15
tPS
20
years
NOTES:
1. Referenced to VCC = 4.2 to 5.5 V at Topr = 0 to 60° C (program space)/ Topr = -40 to 125° C(data space),
unless otherwise specified.
2. VCC = 5.0 V; TOPR = 25° C
3. Program and erase endurance is defined as number of program-erase cycles per block.
If program and erase endurance is n cycle (n = 100, 1000, 10000), each block can be erased and programmed n
cycles.
For example, if a 2-Kbyte block A is erased after programming one-word data to each address 1,024 times,
this counts as one program and erase endurance. Data cannot be programmed to the same address more than
once without erasing the block. (rewrite prohibited).
4. Number of E/W cycles for which operation is guranteed (1 to minimum value are guranteed).
5. Topr = 55° C
6. Referenced to VCC = 4.2 to 5.5 V at Topr = -40 to 125° C unless otherwise specified.
7. Table 21.82 applies for data space in U7 when program and erase endurance is more than 1,000 cycles.
Otherwise, use Table 21.81.
8. To reduce the number of program and erase endurance when working with systems requiring numerous rewrites,
write to unused word addresses within the block instead of rewrite. Erase block only after all possible addresses
are used. For example, an 8-word program can be written 128 times maximum before erase becomes necessary.
Maintaining an equal number of times erasure between block A and block B will also improve efficiency. It is
recommended to track the total number of erasure performed per block and to limit the number of erasure.
9. If an erase error is generated during block erase, execute the clear status register command and block erase
command at least 3 times until an erase error is not generated.
10. When executing more than 100 times rewrites, set one wait state per block access by setting the FMR17 bit in
the FMR1 register to 1 (wait state). When accessing to all other blocks and internal RAM, wait state can be set
by the PM17 bit, regardless of the FMR17 bit setting value.
11. The program and erase endurance is 100 cycles for program space and data space in U3; 1,000 cycles
for program space in U7.
12. Please contact Renesas Technology Corp. or an authorized Renesas Technology Corp. product distributor for
further details on the E/W failure rate.
Erase suspend
request
(interrupt request)
FMR46
td(SR-ES)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 411 of 458
21. Electrical Characteristics (V-version)
M16C/29 Group
Table 21.83 Power Supply Circuit Timing Characteristics
Symbol
Parameter
Measurement Condition
td(P-R)
Wait Time to Stabilize Internal Supply Voltage when
Power-on
td(ROC)
Wait Time to Stabilize Internal On-chip Oscillator when
Power-on
td(S-R)
td(E-A)
Standard
Min.
Typ.
Max.
Unit
2
ms
40
µs
STOP Release Time
150
µs
Low Power Dissipation Mode Wait Mode Release
Time
150
µs
td(P-R)
Wait time to stabilize internal
supply voltage when power-on
VCC
ROC
td(ROC)
Wait time to stabilize internal
on-chip oscillator when poweron
td(P-R)
td(ROC)
RESET
Interrupt for
(a) Stop mode release
or
(b) Wait mode release
td(R-S)
STOP release time
td(W-S)
VCC=4.2 to 5.5V
Low power dissipation mode
wait mode release time
CPU clock
(a)
(b)
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 412 of 458
td(R-S)
td(W-S)
21. Electrical Characteristics (V-version)
M16C/29 Group
VCC = 5V
Table 21.84 Electrical Characteristics (1)
Symbol
VOH
VOH
Parameter
Output High P00 to
("H") Voltage P70 to
Output High P00 to
("H") Voltage P70 to
P07,
P77,
P07,
P77,
P10 to
P80 to
P10 to
P80 to
P17,
P87,
P17,
P87,
P20 to
P90 to
P20 to
P90 to
Condition
XOUT
Output High ("H") Voltage
XCOUT
VOH
VOL
VOL
Output Low P00 to
("L") Voltage P70 to
Output Low P00 to
("L") Voltage P70 to
IOH = -5 mA
Typ. Max.
VCC
VCC-2.0
IOH = -200 µA
VCC-0.3
VCC
High Power
IOH = -1 mA
VCC-2.0
VCC
Low Power
IOH = -0.5 mA
VCC-2.0
VCC
High Power
No load applied
2.5
Low Power
No load applied
1.6
P27,
P93,
P27,
P93,
Output High ("H") Voltage
Standard
P30 to
P95 to
P30 to
P95 to
P37,
P97,
P37,
P97,
P60 to P67,
P100 to P107
P60 to P67,
P100 to P107
Min.
Unit
V
V
V
V
P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
IOL = 5 mA
2.0
V
P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
IOL = 200 µA
0.45
V
High Power
IOL = 1 mA
2.0
Low Power
IOL = 0.5 mA
2.0
High Power
No load applied
0
Low Power
No load applied
0
Output Low ("L") Voltage
XOUT
Output Low ("L") Voltage
XCOUT
VOL
V
V
VT+-VT- Hysteresis
TA0IN-TA4IN, TB0IN-TB2IN, INT0-INT5, NMI, ADTRG, CTS0CTS2, SCL, SDA, CLK0-CLK2, TA2OUT-TA4OUT, KI0-KI3, RXD0RXD2, SIN3, SIN4
VT+-VT- Hysteresis
RESET
0.2
2.5
V
VT+-VT- Hysteresis
XIN
0.2
0.8
V
IIH
IIL
Input High
P00 to P07, P10 to P17,
("H") Current P70 to P77, P80 to P87,
XIN, RESET, CNVSS
Input Low
P00 to P07, P10 to P17,
("L") Current P70 to P77, P80 to P87,
RPULLUP Pull-up
Resistance
0.2
1.0
V
P20 to P27, P30 to P37, P60 to P67,
P90 to P93, P95 to P97, P100 to P107
VI = 5 V
5.0
µA
P20 to P27, P30 to P37, P60 to P67,
P90 to P93, P95 to P97, P100 to P107
VI = 0 V
-5.0
µA
170
kΩ
XIN, RESET, CNVSS
P00 to P07, P10 to P17, P20 to P27, P30 to P37, P60 to P67,
P70 to P77, P80 to P87, P90 to P93, P95 to P97, P100 to P107
VI = 0 V
30
50
RfXIN
Feedback Resistance
XIN
1.5
MΩ
RfXCIN
Feedback Resistance
XCIN
15
MΩ
VRAM
RAM Standby Voltage
In stop mode
2.0
V
NOTE:
1. Referenced to VCC = 4.2 to 5.5 V, VSS = 0 V at Topr = -40 to 105 ° C, f(BCLK) = 20 MHz / VCC = 4.2 to 5.5 V, VSS = 0 V at
Topr = -40 to 125 ° C, f(BCLK) = 16 MHz, unless otherwise specified.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 413 of 458
21. Electrical Characteristics (V-version)
M16C/29 Group
VCC = 5V
Table 21.85 Electrical Characteristics (2) (1)
Symbol
ICC
Parameter
Measurement Condition
Power Supply
Output pins are Mask ROM
Current
left open and
(VCC=4.2 to 5.5V) other pins are
connected to VSS
Flash memory
Flash memory
program
Flash memory
erase
Mask ROM
Flash memory
Mask ROM,
Flash memory
f(BCLK) = 20 MHz,
main clock, no division
f(BCLK) = 16 MHz,
main clock, no division
On-chip oscillation,
f2(ROC) selected, f(BCLK) = 1 MHz
f(BCLK) = 20 MHz,
main clock, no division
f(BCLK) = 16 MHz,
main clock, no division
On-chip oscillation, f2(ROC) selected,
f(BCLK) = 1 MHz
Standard
Min.
Typ.
18
14
Unit
Max.
25 mA
20
2
mA
mA
18
25
mA
14
20
mA
2
mA
11
mA
f(BCLK) = 10 MHz, Vcc = 5.0 V
11
mA
f(BCLK) = 32 kHz,
In low-power consumption mode,
Program running on ROM(3)
On-chip oscillation,
f2(ROC) selected, f(BCLK) = 1 MHz, In
wait mode
f(BCLK) = 32 kHz,
In low-power consumption mode,
Program running on RAM(3)
f(BCLK) = 32 kHz,
In low-power consumption mode,
Program running on flash memory(3)
On-chip oscillation, f2(ROC) selected,
f(BCLK) = 1 MHz, In wait mode
f(BCLK) = 32 kHz, In wait mode(2),
Oscillation capacity high
f(BCLK) = 32 kHz, In wait mode(2),
Oscillation capacity low
While clock stops, Topr = 25° C
25
µA
50
µA
25
µA
450
µA
50
µA
8.5
µA
3
µA
f(BCLK) = 10 MHz, Vcc = 5.0 V
µA
0.8
3
NOTES:
1. Referenced to VCC = 4.2 to 5.5 V, VSS = 0 V at Topr = -40 to 105 ° C, f(BCLK) = 20MHz / VCC = 4.2 to 5.5 V, VSS = 0V at
Topr = -40 to 125 ° C, f(BCLK) = 16 MHz, unless otherwise specified.
2. With one timer operates, using fC32.
3. This indicates the memory in which the program to be executed exists.
Rev. 1.12 Mar.30, 2007
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21. Electrical Characteristics (V-version)
M16C/29 Group
VCC = 5V
Timing Requirements
(Vcc=5V, Vss=0V, at Topr=-40 to 125°C unless otherwise specified)
Table 21.86 External Clock Input (XIN input)
Symbol
Standard
Parameter
tc
External Clock Input Cycle Time
tw(H)
External Clock Input High ("H") Width
tw(L)
External Clock Input Low ("L") Width
tr
External Clock Rise Time
tf
External Clock Fall Time
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Min.
Max.
Unit
Topr=-40° C to 105° C
50
ns
Topr=-40° C to 125° C
62.5
ns
Topr=-40° C to 105° C
20
ns
Topr=-40° C to 125° C
25
ns
Topr=-40° C to 105° C
20
ns
Topr=-40° C to 125° C
25
ns
Topr=-40° C to 105° C
9
ns
Topr=-40° C to 125° C
15
ns
Topr=-40° C to 105° C
9
ns
Topr=-40° C to 125° C
15
ns
21. Electrical Characteristics (V-version)
M16C/29 Group
VCC = 5V
Timing Requirements
(VCC=5V, VSS=0V, at Topr=-40 to 125°C unless otherwise specified)
Table 21.87 Timer A Input (Counter Input in Event Counter Mode)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc(TA)
TAiIN Input Cycle Time
100
ns
tw(TAH)
TAiIN Input High ("H") Width
40
ns
tw(TAL)
TAiIN Input Low ("L") Width
40
ns
Table 21.88 Timer A Input (Gating Input in Timer Mode)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc(TA)
TAiIN Input Cycle Time
400
ns
tw(TAH)
TAiIN Input High ("H") Width
200
ns
tw(TAL)
TAiIN Input Low ("L") Width
200
ns
Table 21.89 Timer A Input (External Trigger Input in One-shot Timer Mode)
Symbol
Parameter
Standard
Min.
Max.
200
Unit
tc(TA)
TAiIN Input Cycle Time
ns
tw(TAH)
TAiIN Input High ("H") Width
100
ns
tw(TAL)
TAiIN Input Low ("L") Width
100
ns
Table 21.90 Timer A Input (External Trigger Input in Pulse Width Modulation Mode)
Symbol
Parameter
Standard
Min.
Max.
Unit
tw(TAH)
TAiIN Input High ("H") Width
100
ns
tw(TAL)
TAiIN Input Low ("L") Width
100
ns
Table 21.91 Timer A Input (Counter Increment/decrement Input in Event Counter Mode)
Symbol
Parameter
tc(UP)
TAiOUT Input Cycle Time
Standard
Min.
Max.
2000
Unit
ns
tw(UPH)
TAiOUT Input High ("H") Width
1000
ns
tw(UPL)
TAiOUT Input Low ("L") Width
1000
ns
tsu(UP-TIN)
TAiOUT Input Setup Time
400
ns
th(TIN-UP)
TAiOUT Input Hold Time
400
ns
Table 21.92 Timer A Input (Two-phase Pulse Input in Event Counter Mode)
Symbol
tc(TA)
Parameter
TAiIN Input Cycle Time
tsu(TAIN-TAOUT) TAiOUT Input Setup Time
tsu(TAOUT-TAIN)
TAiIN Input Setup Time
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Standard
Min.
800
Unit
Max.
ns
200
ns
200
ns
21. Electrical Characteristics (V-version)
M16C/29 Group
VCC = 5V
Timing Requirements
(VCC=5V, VSS=0V, at Topr=-40 to 125°C unless otherwise specified)
Table 21.93 Timer B Input (Counter Input in Event Counter Mode)
Symbol
Parameter
tc(TB)
TBiIN Input Cycle Time (counted on one edge)
Standard
Min.
Max.
100
Unit
ns
tw(TBH)
TBiIN Input High ("H") Width (counted on one edge)
40
ns
tw(TBL)
TBiIN Input Low ("L") Width (counted on one edge)
40
ns
tc(TB)
TBiIN Input Cycle Time (counted on both edges)
200
ns
tw(TBH)
TBiIN Input High ("H") Width (counted on both edges)
80
ns
tw(TBL)
TBiIN Input Low ("L") Width (counted on both edges)
80
ns
Table 21.94 Timer B Input (Pulse Period Measurement Mode)
Symbol
Parameter
Standard
Min.
Max .
Unit
tc(TB)
TBiIN Input Cycle Time
400
ns
tw(TBH)
TBiIN Input High ("H") Width
200
ns
tw(TBL)
TBiIN Input Low ("L") Width
200
ns
Table 21.95 Timer B Input (Pulse Width Measurement Mode)
Symbol
Parameter
Standard
Min.
Max.
Unit
tc(TB)
TBiIN Input Cycle Time
400
ns
tw(TBH)
TBiIN Input High ("H") Width
200
ns
tw(TBL)
TBiIN Input Low ("L") Width
200
ns
Table 21.96 A/D Trigger Input
Symbol
Parameter
Standard
Min.
Ma x
Unit
tc(AD)
ADTRG Input Cycle Time (required for trigger)
1000
ns
tw(ADL)
ADTRG Input Low ("L") Width
12 5
ns
Table 21.97 Serial I/O
Symbol
Parameter
Standard
Min.
Max.
Unit
tc(CK)
CLKi Input Cycle Time
200
ns
tw(CKH)
CLKi Input High ("H") Width
100
ns
tw(CKL)
CLKi Input Low ("L") Width
100
ns
td(C-Q)
TxDi Output Delay Time
th(C-Q)
TxDi Hold Time
0
ns
tsu(D-C)
RxDi Input Setup Time
70
ns
th(C-Q)
RxDi Input Hold Time
90
ns
80
ns
Table 21.98 External Interrupt INTi Input
Symbol
Parameter
Standard
Min.
Max.
Unit
tw(INH)
INTi Input High ("H") Width
250
ns
tw(INL)
INTi Input Low ("L") Width
250
ns
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21. Electrical Characteristics (V-version)
M16C/29 Group
VCC = 5V
Timing Requirements
(VCC=5V, VSS=0V, at Topr=-40 to 125°C unless otherwise specified)
Table 21.99 Multi-master I2C Bus Line
Symbol
Parameter
Standard clock mode
Min.
Max.
High-speed clock mode
Min.
Max.
Unit
tBUF
Bus free time
4.7
1.3
µs
tHD;STA
The hold time in start condition
µs
The hold time in SCL clock "0" status
4.0
4.7
0.6
tLOW
1.3
20+0.1Cb
µs
tR
SCL, SDA signals' rising time
tHD;DAT
Data hold time
tHIGH
The hold time in SCL clock "1" status
1000
0
0
4.0
0.6
20+0.1Cb
300
ns
0.9
µs
µs
tF
SCL, SDA signals' falling time
tSU;DAT
Data setup time
250
100
ns
tSU;STA
The setup time in restart condition
4.7
0.6
tSU;STO
µs
Stop condition setup time
4.0
0.6
µs
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300
300
ns
21. Electrical Characteristics (V-version)
M16C/29 Group
VCC = 5V
XIN input
tf
tw(H)
tr
tw(L)
tc
tc(TA)
tw(TAH)
TAiIN input
tw(TAL)
tc(UP)
tw(UPH)
TAiOUT input
tw(UPL)
TAiOUT input
(Counter increment/
decrement input)
In event counter mode
TAiIN input
th(TIN–UP)
(When count on falling edge)
tsu(UP–TIN)
TAiIN input
(When count on rising edge)
Two-phase pulse input in
event counter mode
tc(TA)
TAiIN input
tsu(TAIN-TAOUT)
tsu(TAIN-TAOUT)
tsu(TAOUT-TAIN)
TAiOUT input
tsu(TAOUT-TAIN)
tw(TBH)
TBiIN input
tc(TB)
tw(TBL)
tc(AD)
tw(ADL)
ADTRG input
Figure 21.13 Timing Diagram (1)
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21. Electrical Characteristics (V-version)
M16C/29 Group
VCC = 5V
tc(CK)
tw(CKH)
CLKi
tw(CKL)
th(C–Q)
TxDi
td(C–Q)
tsu(D–C)
RxDi
th(C–D)
tw(INL)
INTi input
tw(INH)
Figure 21.14 Timing Diagram (2)
VCC = 5V
SDA
tHD:STA
tBUF
tLOW
SCL
p
tR
Sr
tHD:DTA
Figure 21.15 Timing Diagram (3)
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tF
S
tHD:STA
page 420 of 458
tsu:STO
tHIGH
tsu:DAT
tsu:STA
p
22. Usage Notes
M16C/29 Group
22. Usage Notes
22.1 SFRs
22.1.1 For 80-Pin Package
Set the IFSR20 bit in the IFSR2A register to 0 after reset and set bits PACR2 to PACR0 in the PACR
register to 0112.
22.1.2 For 64-Pin Package
Set the IFSR20bit in the IFSR2A register to 0 after reset and set bits PACR2 to PACR0 in the PACR
register to 0102.
22.1.3 Register Setting
Immediate values should be set in the registers containing write-only bits. When establishing a new value
by modifying a previous value, write the previous value into RAM as well as the register. Change the
contents of the RAM and then transfer the new value to the register.
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22. Usage Notes
M16C/29 Group
22.2 Clock Generation Circuit
22.2.1 PLL Frequency Synthesizer
Stabilize supply voltage so that the standard of the power supply ripple is met.
Symbol
Standard
Parameter
Min.
Typ.
Max.
Unit
f(ripple)
Power supply ripple allowable frequency(VCC)
10
kHz
Vp-p(ripple)
Power supply ripple allowabled amplitude
voltage
(VCC=5V)
0.5
V
(VCC=3V)
0.3
V
VCC(|DV/DT|)
Power supply ripple rising/falling gradient
(VCC=5V)
0.3
V/ms
(VCC=3V)
0.3
V/ms
f(ripple)
Power supply ripple allowable frequency
(VCC)
Vp-p(ripple)
Power supply ripple allowable amplitude
voltage
f(ripple)
VCC
Figure 22.1 Voltage Fluctuation Timing
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Vp-p(ripple)
22. Usage Notes
M16C/29 Group
22.2.2 Power Control
1. When exiting stop mode by hardware reset, the device will startup using the on-chip oscillator.
2. Set the MR0 bit in the TAiMR register(i=0 to 4) to 0 (pulse is not output) to use the timer A to exit stop
mode.
3. When entering wait mode, insert a JMP.B instruction before a WAIT instruction. Do not excute any
instructions which can generate a write to RAM between the JMP.B and WAIT instructions. Disable the
DMA transfers, if a DMA transfer may occur between the JMP.B and WAIT instructions. After the WAIT
instruction, insert at least 4 NOP instructions. When entering wait mode, the instruction queue reads
ahead the instructions following WAIT, and depending on timing, some of these may execute before the
MCU enters wait mode.
Program example when entering wait mode
Program Example:
JMP.B
L1
; Insert JMP.B instruction before WAIT instruction
FSET
WAIT
NOP
NOP
NOP
NOP
I
;
; Enter wait mode
; More than 4 NOP instructions
L1:
4. When entering stop mode, insert a JMP.B instruction immediately after executing an instruction which
sets the CM10 bit in the CM1 register to 1, and then insert at least 4 NOP instructions. When entering
stop mode, the instruction queue reads ahead the instructions following the instruction which sets the
CM10 bit to 1 (all clock stops), and, some of these may execute before the MCU enters stop mode or
before the interrupt routine for returning from stop mode.
Program example when entering stop mode
Program Example:
FSET
BSET
JMP.B
I
CM10
L2
; Enter stop mode
; Insert JMP.B instruction
L1:
NOP
NOP
NOP
NOP
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; More than 4 NOP instructions
22. Usage Notes
M16C/29 Group
5. Wait until the main clock oscillation stabilization time, before switching the CPU clock source to the
main clock.
Similarly, wait until the sub clock oscillates stably before switching the CPU clock source to the sub
clock.
6. Suggestions to reduce power consumption
(a) Ports
The processor retains the state of each I/O port even when it goes to wait mode or to stop mode. A
current flows in active I/O ports. A dash current may flow through the input ports in high impedance
state, if the input is floating. When entering wait mode or stop mode, set non-used ports to input and
stabilize the potential.
(b) A/D converter
When A/D conversion is not performed, set the VCUT bit in ADiCON1 register to 0 (no Vref connection). When A/D conversion is performed, start the A/D conversion at least 1 µs or longer after setting
the VCUT bit to 1 (Vref connection).
(c) Stopping peripheral functions
Use the CM0 register CM02 bit to stop the unnecessary peripheral functions during wait mode.
However, because the peripheral function clock (fC32) generated from the sub-clock does not stop,
this measure is not conducive to reducing the power consumption of the chip. If low speed mode or
low power dissipation mode is to be changed to wait mode, set the CM02 bit to 0 (do not peripheral
function clock stopped when in wait mode), before changing wait mode.
(d) Switching the oscillation-driving capacity
Set the driving capacity to “LOW” when oscillation is stable.
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22. Usage Notes
M16C/29 Group
22.3 Protection
Set the PRC2 bit to 1 (write enabled) and then write to any address, and the PRC2 bit will be cleared to 0
(write protected). The registers protected by the PRC2 bit should be changed in the next instruction after
setting the PRC2 bit to 1. Make sure no interrupts or DMA transfers will occur between the instruction in
which the PRC2 bit is set to 1 and the next instruction.
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22. Usage Notes
M16C/29 Group
22.4 Interrupts
22.4.1 Reading Address 0000016
Do not read the address 0000016 in a program. When a maskable interrupt request is accepted, the CPU
reads interrupt information (interrupt number and interrupt request priority level) from the address
0000016 during the interrupt sequence. At this time, the IR bit for the accepted interrupt is cleared to 0.
If the address 0000016 is read in a program, the IR bit for the interrupt which has the highest priority
among the enabled interrupts is cleared to 0. This causes a problem that the interrupt is canceled, or an
unexpected interrupt request is generated.
22.4.2 Setting the SP
Set any value in the SP(USP, ISP) before accepting an interrupt. The SP(USP, ISP) is cleared to 000016
after reset. Therefore, if an interrupt is accepted before setting any value in the SP(USP, ISP), the program may go out of control.
_______
22.4.3 NMI Interrupt
_______
_______
1. The NMI interrupt is invalid after reset. The NMI interrupt becomes effective by setting the PM24 bit in
_______
the PM2 register to “1”. Set the PM24 bit to "1" when a high-level signal ("H") is applied to the NMI pin.
_______
_______
If the PM24 bit is set to "1" when a low-level signal ("L") is applied, NMI interrupt is generated. Once NMI
interrupt is enabled, it will not be disabled unless a reset is applied.
_______
2. The input level of the NMI pin can be read by accessing the P8_5 bit in the P8 register.
_______
_______
3. When selecting NMI function, stop mode cannot be entered into while input on the NMI pin is low. This
_______
is because while input on the NMI pin is low the CM1 register’s CM10 bit is fixed to 0.
_______
_______
4. When selecting NMI function, do not go to wait mode while input on the NMI pin is low. This is because
_______
when input on the NMI pin goes low, the CPU stops but CPU clock remains active; therefore, the current
consumption in the chip does not drop. In this case, normal condition is restored by an interrupt generated thereafter.
_______
_______
5. When selecting NMI function, the low and high level durations of the input signal to the NMI pin must
each be 2 CPU clock cycles + 300 ns or more.
_______
6. When using the NMI interrupt for exiting stop mode, set the NDDR register to FF16 (disable digital
debounce filter) before entering stop mode.
22.4.4 Changing the Interrupt Generate Factor
If the interrupt generate factor is changed, the IR bit in the interrupt control register for the changed
interrupt may inadvertently be set to 1 (interrupt requested). If you changed the interrupt generate factor
for an interrupt that needs to be used, be sure to clear the IR bit for that interrupt to 0 (interrupt not
requested).
“Changing the interrupt generate factor” referred to here means any act of changing the source, polarity
or timing of the interrupt assigned to each software interrupt number. Therefore, if a mode change of any
peripheral function involves changing the generate factor, polarity or timing of an interrupt, be sure to
clear the IR bit for that interrupt to 0 (interrupt not requested) after making such changes. Refer to the
description of each peripheral function for details about the interrupts from peripheral functions.
Figure 22.2 shows the procedure for changing the interrupt generate factor.
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22. Usage Notes
M16C/29 Group
Changing the interrupt source
Disable interrupts (2,3)
Change the interrupt generate factor (including a mode change of peripheral function)
Use the MOV instruction to clear the IR bit to 0 (interrupt not requested) (3)
Enable interrupts (2,3)
End of change
IR bit: A bit in the interrupt control register for the interrupt whose interrupt generate factor is to
be changed
NOTES:
1.The above settings must be executed individually. Do not execute two or more settings
simultaneously (using one instruction).
2. Use the I flag for the INTi interrupt (i = 0 to 5).
For the interrupts from peripheral functions other than the INTi interrupt, turn off the
peripheral function that is the source of the interrupt in order not to generate an interrupt
request before changing the interrupt generate factor. In this case, if the maskable interrupts
can all be disabled without causing a problem, use the I flag. Otherwise, use the corresponding
bits ILVL2 to ILVL0 for the interrupt whose interrupt generate factor is to be changed.
3. Refer to 22.4.6 Rewrite the Interrupt Control Register for details about the
instructions to use and the notes to be taken for instruction execution.
Figure 22.2 Procedure for Changing the Interrupt Generate Factor
______
22.4.5 INT Interrupt
1. Either an “L” level of at least tW(INH) or an “H” level of at least tW(INL) width is necessary for the signal
input to pins INT0 through INT5 regardless of the CPU operation clock.
2. If the POL bit in registers INT0IC to INT5IC or bits IFSR7 to IFSR0 in the IFSR register are changed,
the IR bit may inadvertently set to 1 (interrupt requested). Be sure to clear the IR bit to 0 (interrupt not
requested) after changing any of those register bits.
3. When using the INT5 interrupt for exiting stop mode, set the P17DDR register to FF16 (disable digital
debounce filter) before entering stop mode.
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22. Usage Notes
M16C/29 Group
22.4.6 Rewrite the Interrupt Control Register
(1) The interrupt control register for any interrupt should be modified in places where no requests for that
interrupt may occur. Otherwise, disable the interrupt before rewriting the interrupt control register.
(2) To rewrite the interrupt control register for any interrupt after disabling that interrupt, be careful with the
instruction to be used.
Changing any bit other than the IR bit
If while executing an instruction, a request for an interrupt controlled by the register being modified
occurs, the IR bit in the register may not be set to 1 (interrupt requested), with the result that the
interrupt request is ignored. If such a situation presents a problem, use the instructions shown below
to modify the register.
Usable instructions: AND, OR, BCLR, BSET
Changing the IR bit
Depending on the instruction used, the IR bit may not always be cleared to 0 (interrupt not requested).
Therefore, be sure to use the MOV instruction to clear the IR bit.
(3) When using the I flag to disable an interrupt, refer to the sample program fragments shown below as
you set the I flag. (Refer to (2) for details about rewrite the interrupt control registers in the sample
program fragments.)
Examples 1 through 3 show how to prevent the I flag from being set to 1 (interrupts enabled) before the
interrupt control register is rewrited, due to the internal bus and the instruction queue buffer.
Example 1: Using the NOP instruction to keep the program waiting until the
interrupt control register is modified
INT_SWITCH1:
FCLR
I
AND.B
#00h, 0055h
NOP
NOP
FSET
I
; Disable interrupts
;Set the TA0IC register to 0016
;
; Enable interrupts
The number of NOP instruction is as follows.
PM20 = 1 (1 wait) : 2, PM20 = 0 (2 waits): 3
Example 2:Using the dummy read to keep the FSET instruction waiting
INT_SWITCH2:
FCLR
I
AND.B
#00h, 0055h
MOV.W MEM, R0
FSET
I
; Disable interrupts
; Set the TA0IC register to 0016
; Dummy read
; Enable interrupts
Example 3:Using the POPC instruction to changing the I flag
INT_SWITCH3:
PUSHC FLG
FCLR
I
AND.B
#00h, 0055h
POPC
FLG
; Disable interrupts
; Set the TA0IC register to 0016
; Enable interrupts
22.4.7 Watchdog Timer Interrupt
Initialize the watchdog timer after the watchdog timer interrupt occurs.
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22. Usage Notes
M16C/29 Group
22.5 DMAC
22.5.1 Write to DMAE Bit in DMiCON Register
When both of the conditions below are met, follow the steps below.
(a) Conditions
• The DMAE bit is set to 1 again while it remains set (DMAi is in an active state).
• A DMA request may occur simultaneously when the DMAE bit is being written.
(b) Procedure
(1) Write 1 to the DMAE bit and DMAS bit in DMiCON register simultaneously(1).
(2) Make sure that the DMAi is in an initial state(2) in a program.
If the DMAi is not in an initial state, the above steps should be repeated.
NOTES:
1. The DMAS bit remains unchanged even if 1 is written. However, if 0 is written to this bit, it is
set to 0 (DMA not requested). In order to prevent the DMAS bit from being modified to 0, 1
should be written to the DMAS bit when 1 is written to the DMAE bit. In this way the state of the
DMAS bit immediately before being written can be maintained.
Similarly, when writing to the DMAE bit with a read-modify-write instruction, 1 should be written to
the DMAS bit in order to maintain a DMA request which is generated during execution.
2. Read the TCRi register to verify whether the DMAi is in an initial state. If the read value is equal to
a value which was written to the TCRi register before DMA transfer start, the DMAi is in an initial
state. (If a DMA request occurs after writing to the DMAE bit, the value written to the TCRi register
is 1.) If the read value is a value in the middle of transfer, the DMAi is not in an initial state.
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22. Usage Notes
M16C/29 Group
22.6 Timers
22.6.1 Timer A
22.6.1.1 Timer A (Timer Mode)
1. The timer remains idle after reset. Set the mode, count source, counter value, etc. using the TAiMR
(i = 0 to 4) register and the TAi register before setting the TAiS bit in the TABSR register to 1 (count
starts).
Always make sure the TAiMR register is modified while the TAiS bit remains 0 (count stops) regardless whether after reset or not.
2. While counting is in progress, the counter value can be read out at any time by reading the TAi
register. However, if the TAi register is read at the same time the counter is reloaded, the read value
is always FFFF16. If the TAi register is read after setting a value in it, but before the counter starts
counting, the read value is the one that has been set in the register.
_____
3. If a low-level signal is applied to the SD pin when the IVPCR1 bit in the TB2SC register is set to 1
_____
(three-phase output forcible cutoff by input on SD pin enabled), the TA1OUT, TA2OUT and TA4OUT
pins go to a high-impedance state.
22.6.1.2 Timer A (Event Counter Mode)
1. The timer remains idle after reset. Set the mode, count source, counter value, etc. using the TAiMR
(i = 0 to 4) register, the TAi register, the UDF register, bits TAZIE, TA0TGL, and TA0TGH in the
ONSF register and the TRGSR register before setting the TAiS bit in the TABSR register to 1 (count
starts).
Always make sure bits TAZIE, TA0TGL, and TA0TGH in the TAiMR register, the UDF register, the
ONSF register, and the TRGSR register are modified while the TAiS bit remains 0 (count stops)
regardless whether after reset or not.
2. While counting is in progress, the counter value can be read out at any time by reading the TAi
register. However, if the TAi register is read at the same time the counter is reloaded, the read value
is always FFFF16 when the timer counter underflows and 000016 when the timer counter overflows.
If the TAi register is read after setting a value in it, but before the counter starts counting, the read
value is the one that has been set in the register.
_____
3. If a low-level signal is applied to the SD pin when the IVPCR1 bit in the TB2SC register is set to 1
_____
(three-phase output forcible cutoff by input on SD pin enabled), the TA1OUT, TA2OUT and TA4OUT
pins go to a high-impedance state.
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22. Usage Notes
M16C/29 Group
22.6.1.3 Timer A (One-shot Timer Mode)
1. The timer remains idle after reset. Set the mode, count source, counter value, etc. using the TAiMR
(i = 0 to 4) register, the TAi register, bits TA0TGL and TA0TGH in the ONSF register and the
TRGSR register before setting the TAiS bit in the TABSR register to 1 (count starts).
Always make sure bits TA0TGL and TA0TGH in the TAiMR register, the ONSF register, and the
TRGSR register are modified while the TAiS bit remains 0 (count stops) regardless whether after
reset or not.
2. When setting TAiS bit to 0 (count stop), the followings occur:
• A counter stops counting and a content of reload register is reloaded.
• TAiOUT pin outputs “L”.
• After one cycle of the CPU clock, the IR bit in TAiIC register is set to 1 (interrupt request).
3. Output in one-shot timer mode synchronizes with a count source internally generated. When the
external trigger has been selected, a maximun delay of one cycle of the count source occurs between the trigger input to TAiIN pin and output in one-shot timer mode.
4. The IR bit is set to 1 when timer operation mode is set with any of the following procedures:
• Select one-shot timer mode after reset.
• Change an operation mode from timer mode to one-shot timer mode.
• Change an operation mode from event counter mode to one-shot timer mode.
To use the timer Ai interrupt (the IR bit), set the IR bit to 0 after the changes listed above have been
made.
5. When a trigger occurs while the timer is counting, the counter reloads the reload register value, and
continues counting after a second trigger is generated and the counter is decremented once. To
generate a trigger while counting, space more than one cycle of the timer count source from the first
trigger and generate again.
6. When selecting the external trigger for the count start conditions in timer A one-shot timer mode, do
generate an external trigger 300ns before the count value of timer A is set to 000016. The one-shot
timer does not continue counting and may stop.
_____
7. If a low-level signal is applied to the SD pin when the IVPCR1 bit in the TB2SC register is set to 1
_____
(three-phase output forcible cutoff by input on SD pin enabled), the TA1OUT, TA2OUT and TA4OUT
pins go to a high-impedance state.
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22. Usage Notes
M16C/29 Group
22.6.1.4 Timer A (Pulse Width Modulation Mode)
1. The timer remains idle after reset. Set the mode, count source, counter value, etc. using bits
TA0TGL and TA0TGH in the TAiMR (i = 0 to 4) register, the TAi register, the ONSF register and the
TRGSR register before setting the TAiS bit in the TABSR register to 1 (count starts).
Always make sure bits TA0TGL and TA0TGH in the TAiMR register, the ONSF register and the
TRGSR register are modified while the TAiS bit remains 0 (count stops) regardless whether after
reset or not.
2. The IR bit is set to 1 when setting a timer operation mode with any of the following procedures:
• Select the PWM mode after reset.
• Change an operation mode from timer mode to PWM mode.
• Change an operation mode from event counter mode to PWM mode.
To use the timer Ai interrupt (interrupt request bit), set the IR bit to 0 by program after the above
listed changes have been made.
3. When setting TAiS register to 0 (count stop) during PWM pulse output, the following action occurs:
• Stop counting.
• When TAiOUT pin is output “H”, output level is set to “L” and the IR bit is set to 1.
• When TAiOUT pin is output “L”, both output level and the IR bit remains unchanged.
_____
4. If a low-level signal is applied to the SD pin when the IVPCR1 bit in the TB2SC register is set to 1
_____
(three-phase output forcible cutoff by input on SD pin enabled), the TA1OUT, TA2OUT and TA4OUT
pins go to a high-impedance state.
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22. Usage Notes
M16C/29 Group
22.6.2 Timer B
22.6.2.1 Timer B (Timer Mode)
1. The timer remains idle after reset. Set the mode, count source, counter value, etc. using the TBiMR
(i = 0 to 2) register and TBi register before setting the TBiS bit in the TABSR register to 1 (count
starts).
Always make sure the TBiMR register is modified while the TBiS bit remains 0 (count stops) regardless whether after reset or not.
2. The counter value can be read out at any time by reading the TBi register. However, if this register
is read at the same time the counter is reloaded, the read value is always FFFF16. If the TBi register
is read after setting a value in it but before the counter starts counting, the read value is the one that
has been set in the register.
22.6.2.2 Timer B (Event Counter Mode)
1. The timer remains idle after reset. Set the mode, count source, counter value, etc. using the TBiMR
(i = 0 to 2) register and TBi register before setting the TBiS bit in the TABSR register to 1 (count
starts).
Always make sure the TBiMR register is modified while the TBiS bit remains 0 (count stops) regardless whether after reset or not.
2. The counter value can be read out at any time by reading the TBi register. However, if this register
is read at the same time the counter is reloaded, the read value is always FFFF16. If the TBi register
is read after setting a value in it but before the counter starts counting, the read value is the one that
has been set in the register.
22.6.2.3 Timer B (Pulse Period/pulse Width Measurement Mode)
1. The timer remains idle after reset. Set the mode, count source, etc. using the TBiMR (i = 0 to 2)
register before setting the TBiS bit in the TABSR or the TBSR register to 1 (count starts).
Always make sure the TBiMR register is modified while the TBiS bit remains 0 (count stops) regardless whether after reset or not. To clear the MR3 bit to 0 by writing to the TBiMR register while the
TBiS bit is set to 1 (count starts), be sure to write the same value as previously written to bits
TM0D0, TM0D1, MR0, MR1, TCK0, and TCK1 and a 0 to the MR2 bit.
2. The IR bit in TBiIC register (i=0 to 2) goes to 1 (interrupt request), when an effective edge of a
measurement pulse is input or timer Bi is overflowed. The factor of interrupt request can be determined by use of the MR3 bit in TBiMR register within the interrupt routine.
3. If the source of interrupt cannot be identified by the MR3 bit such as when the measurement pulse
input and a timer overflow occur at the same time, use another timer to count the number of times
timer B has overflowed.
4. To set the MR3 bit to 0 (no overflow), set TBiMR register with setting the TBiS bit to 1 and counting
the next count source after setting the MR3 bit to 1 (overflow).
5. Use the IR bit in TBiIC register to detect only overflows. Use the MR3 bit only to determine the
interrupt factor within the interrupt routine.
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22. Usage Notes
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6. When a count is started and the first effective edge is input, an undefined value is transferred to the
reload register. At this time, timer Bi interrupt request is not generated.
7. A value of the counter is undefined at the beginning of a count. MR3 may be set to 1 and timer Bi
interrupt request may be generated between a count start and an effective edge input.
8. For pulse width measurement, pulse widths are successively measured. Use program to check
whether the measurement result is an “H” level width or an “L” level width.
22.6.3 Three-phase Motor Control Timer Function
When the IVPCR1 bit in the TB2SC register is set to 1 (three-phase output forced cutoff by SD pin input
(high-impedance) enabled), the INV03 bit in the INVC0 register is set to 1 (three-phase motor control
_____
timer output enabled), and a low-level ("L") signal is applied to the SD pin while a three-phase PWM
___
___
___
signal is output, the MCU is forced to cutoff and pins U, U, V, V, W, and W are placed in a high-impedance
state and the INV03 bit is set to 0 (three-phase motor control timer output disabled).
___
___
___
To resume the three-phase PWM signal output from pins U, U, V, V, W, and W, set the INV03 bit to 1 and
_____
the IVPCR1 bit to 0 (three-phase output forced cutoff disabled) after the SD pin level becomes "H". Then
set the IVPCR1 bit to 1 (three-phase output forced cutoff enabled) in order to enable the three-phase
output forced cutoff function by input to the SD pin again.
_____
The INV03 bit cannot be set to 1 while an "L" signal is input to the SD pin. To set the INV03 bit to 1 after
forcible cutoff, write 1 to the INV03 bit and read the bit to ensure that it is set to 1 by program. Then set the
IVPCR1 bit to 1 after setting it to 0.
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22. Usage Notes
M16C/29 Group
22.7 Timer S
22.7.1 Rewrite the G1IR Register
Bits in the G1IR register are not automatically set to 0 (no interrupt requested) even if a requested interrupt is acknowledged. Set each bit to 0 by program after the interrupt requests are verified.
The IC/OC interrupt is generated when any bit in the G1IR register is set to 1 (interrupt requested) after all
the bits are set to 0. If conditions to generate an interrupt are met when the G1IR register holds the value
other than 0016, the IC/OC interrupt request will not be generated. In order to enable an IC/OC interrupt
request again, clear the G1IR register to 0016. Use the following instructions to set each bit in the G1IR
register to 0.
Subject instructions: AND, BCL
Figure 22.3 shows an example of IC/OC interrupt i flow chart.
Interrupt(1)
G1IRi = 1 ?
No
Yes
Set the G1IRi bit to 0
Process channel i waveform generating interrupt
G1IRj = 1 ?
No
Yes
Set the G1IRj bit to 0
Process channel j time measurement interrupt
G1IR = 0 ?
No
Yes
Interrupt completed
NOTE:
1. Example for the interrupt operation when using the channel i waveform generating interrupt and
channel j time measurement interrupt.
Figure 22.3 IC/OC Interrupt i Flow Chart
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22. Usage Notes
M16C/29 Group
22.7.2 Rewrite the ICOCiIC Register
When the interrupt request to the ICOCiIC register is generated during the instruction process, the IR bit
may not be set to 1 (interrupt requested) and the interrupt request may not be acknowledged. At that time,
when the bit in the G1IR register is held to 1 (interrupt requested), the following IC/OC interrupt request
will not be generated. When changing the ICOCiIC register settiing, use the following instruction.
Subject instructions: AND, OR, BCLR, BSET
When initializing Timer S, change the ICOCiIC register setting with the request again after setting registers IOCiIC and G1IR to 0016.
22.7.3 Waveform Generating Function
1. If the BTS bit in the G1BCR1 register is set to 0 (base timer is reset) when the waveform is generating
and the base timer is stopped counting, the waveform output pin keeps the same output level. The output
level will be changed when the base timer and the G1POj register match the setting value next time after
the base timer starts counting again.
2. If the G1POCRj register is set when the waveform is generated, the same setting value of the IVL bit is
applied to the waveform generating pin. Do not set the G1POCRj register when the waveform is generating.
3. When the RST1 bit in the G1BCR1 register is set to 1 (the base timer is reset by matching the G1PO0
register), the base timer is reset after two clock cycles of fBT1 when the base timer value matches the
G1PO0 register value. A high-level ("H") signal is applied to the OUTC10 pin between the base timer
value match to the base timer reset.
22.7.4 IC/OC Base Timer Interrupt
If the MCU is operated in the combination selected from Table 22.1 for use when the RST4 bit in the
G1BCR0 register is set to 1 (reset the base timer that matches the G1BTRR register) to reset the base
timer, an IC/OC base timer interrupt request is generated twice.
Table 22.1 Uses of IT Bit in the G1BCR0 Register and G1BTRR Register
IT Bit in the G1BCR0 Register
G1BTRR Register
0 (bit 15 in the base timer overflows)
07FFF16 to 0FFFE16
1 (bit 14 in the base timer overflows)
03FFF16 to 0FFFE16 or
0BFFF16 to 0FFFE16
The second IC/OC base timer interrupt request is generated because the base timer overflow request is
generated after one fBT1 clock cycle as soon as the base timer is reset.
One of the following conditions must be met in order not to generate the IC/OC base timer interrupt
request twice:
1) When the RST4 bit is set to 1, set the G1BTRR register with a combination other than what is listed in
Table 22.1.
2) Do not reset the base timer by matching the G1BTRR register. Reset the base timer by matching the
G1P00 register. In other words, do not set the RST4 bit to 1 to reset the base timer. Set the RST1 bit in
the G1BCR1 register to 1 (reset the base timer that matches the G1P00 register).
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22. Usage Notes
M16C/29 Group
22.8 Serial I/O
22.8.1 Clock-Synchronous Serial I/O
22.8.1.1 Transmission/reception
_______
________
1. With an external clock selected, and choosing the RTS function, the output level of the RTSi pin
goes to “L” when the data-receivable status becomes ready, ________
which informs the transmission side
that the reception________
has become ready. The output
level
of
the
RTSi
pin goes to “H” when reception
________
starts. So if the RTSi pin is connected to the CTSi pin on the transmission side, the
circuit can
_______
transmission and reception data with consistent timing. With the internal clock, the RTS function
has no effect.
_____
2. If a low-level signal is applied to the SD pin when the IVPCR1 bit in the TB2SC register is set to 1
_____
(three-phase output forcible cutoff by input on SD pin enabled), the P73/RTS2/TxD1(when the
U1MAP bit in PACR register is 1) and CLK2 pins go to a high-impedance state.
22.8.1.2 Transmission
When an external clock is selected, the conditions must be met while if the CKPOL bit in the UiC0
register is set to 0 (transmit data output at the falling edge and the receive data taken in at the rising
edge of the transfer clock), the external clock is in the high state; if the CKPOL bit in the UiC0 register
is set to 1 (transmit data output at the rising edge and the receive data taken in at the falling edge of the
transfer clock), the external clock is in the low state.
• The TE bit in UiC1 register is set to 1 (transmission enabled)
• The
TI bit in UiC1 register is set to 0 (data
present in UiTB register)
_______
_______
• If CTS function is selected, input on the CTSi pin is set to “L”
22.8.1.3 Reception
1. In operating the clock-synchronous serial I/O, operating a transmitter generates a shift clock. Fix
settings for transmission even when using the device only for reception. Dummy data is output to
the outside from the TxDi pin when receiving data.
2. When an internal clock is selected, set the TE bit in the UiC1 register (i = 0 to 2) to 1 (transmission
enabled) and write dummy data to the UiTB register, and the shift clock will thereby be generated.
When an external clock is selected, set the TE bit in the UiC1 register (i = 0 to 2) to 1 and write dummy
data to the UiTB register, and the shift clock will be generated when the external clock is fed to the CLKi
input pin.
3. When successively receiving data, if all bits of the next receive data are prepared in the UARTi
receive register while the RE bit in the UiC1 register (i = 0 to 2) is set to 1 (data present in the UiRB
register), an overrun error occurs and the UiRB register OER bit is set to 1 (overrun error occurred).
In this case, because the content of the UiRB register is undefined, a corrective measure must be
taken by programs on the transmit and receive sides so that the valid data before the overrun error
occurred will be retransmitted. Note that when an overrun error occurred, the SiRIC register IR bit
does not change state.
4. To receive data in succession, set dummy data in the lower-order byte of the UiTB register every
time reception is made.
5. When an external clock is selected, make sure the external clock is in high state if the CKPOL bit is
set to 0, and in low state if the CKPOL bit is set to 1 before the following conditions are met:
• The RE bit in the UiC1 register is set to 1 (reception enabled)
• The TE bit in the UiC1 register is set to 1 (transmission enabled)
• The TI bit in the UiC1 register= 0 (data present in the UiTB register)
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22. Usage Notes
M16C/29 Group
22.8.2 UART Mode
22.8.2.1 Special Mode 1 (I2C bus Mode)
When generating start, stop and restart conditions, set the STSPSEL bit in the U2SMR4 register to 0
and wait for more than half cycle of the transfer clock before setting each condition generate bit
(STAREQ, RSTAREQ and STPREQ) from 0 to 1.
22.8.2.2 Special Mode 2
_____
If a low-level signal is applied to the SD pin when the IVPCR1 bit in the TB2SC register is set to 1
_____
(three-phase output forcible cutoff by input on SD pin enabled), the RTS2 and CLK2 pins go to a highimpedance state.
22.8.2.3 Special Mode 4 (SIM Mode)
A transmit interrupt request is generated by setting the U2C1 register U2IRS bit to 1 (transmission
complete) and U2ERE bit to 1 (error signal output) after reset. Therefore, when using SIM mode, be
sure to clear the IR bit to 0 (no interrupt request) after setting these bits.
22.8.3 SI/O3, SI/O4
The SOUTi default value which is set to the SOUTi pin by the SMi7 bit approximately 10ns may be output
when changing the SMi3 bit from 0 (I/O port) to 1 (SOUTi output and CLKfunction) while the SMi2 bit in
the SiC (i=3 and 4) to 0 (SOUTi output) and the SMi6 bit is set to 1 (internal clock). And then the SOUTi
pin is held high-impedance.
If the level which is output from the SOUTi pin is a problem when changing the SMi3 bit from 0 to 1, set the
default value of the SOUTi pin by the SMi7 bit.
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22. Usage Notes
M16C/29 Group
22.9 A/D Converter
1. Set registers ADCON0 (except bit 6), ADCON1, ADCON2 and ADTRGCON when A/D conversion is
stopped (before a trigger occurs).
2. When the VCUT bit in ADCON1 register is changed from 0 (Vref not connected) to 1 (Vref connected),
start A/D conversion after passing 1 µs or longer.
3. To prevent noise-induced device malfunction or latchup, as well as to reduce conversion errors, insert
capacitors between the AVCC, VREF, and analog input pins (ANi, AN0i, AN2i(i=0 to 7), and AN3i(i=0 to
2)) each and the AVSS pin. Similarly, insert a capacitor between the VCC1 pin and the VSS pin. Figure
22.4 is an example connection of each pin.
4. Make sure the port direction bits for those pins that are used as analog inputs are set to 0 (input mode).
Also, if the TGR bit in the ADCON0 register is set to 1 (external trigger), make sure the port direction bit
___________
for the ADTRG pin is set to 0 (input mode).
5. When using key input interrupts, do not use any of the four AN4 to AN7 pins as analog inputs. (A key
input interrupt request is generated when the A/D input voltage goes low.)
6. The φAD frequency must be 10 MHz or less. Without sample-and-hold function, limit the φAD frequency
to 250kHZ or more. With the sample and hold function, limit the φAD frequency to 1MHZ or more.
7. When changing an A/D operation mode, select analog input pin again in bits CH2 to CH0 in the
ADCON0 register and bits SCAN1 to SCAN0 in the ADCON1 register.
MCU
VCC
VCC
C4
VCC
AVCC
VSS
VREF
C1
C2
AVSS
C3
ANi
ANi: ANi, AN0i, AN2i (i=0 to 7), and AN3i (i=0 to 2)
NOTES:
1. C1 ≥ 0.47 µF, C2 ≥ 0.47 µF, C3 ≥ 100 pF, C4 ≥ 0.1 µF (reference)
2. Use thick and shortest possible wiring to connect capacitors.
Figure 22.4 Use of capacitors to reduce noise
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22. Usage Notes
M16C/29 Group
8. If the CPU reads the ADi register (i = 0 to 7) at the same time the conversion result is stored in the ADi
register after completion of A/D conversion, an incorrect value may be stored in the ADi register. This
problem occurs when a divide-by-n clock derived from the main clock or a subclock is selected for CPU
clock.
• When operating in one-shot, single-sweep mode, simultaneous sample sweep mode, delayed
trigger mode 0 or delayed trigger mode 1
Check to see that A/D conversion is completed before reading the target ADi register. (Check the
ADIC register’s IR bit to see if A/D conversion is completed.)
• When operating in repeat mode or repeat sweep mode 0 or 1
Use the main clock for CPU clock directly without dividing it.
9. If A/D conversion is forcibly terminated while in progress by setting the ADST bit in the ADCON0
register to 0 (A/D conversion halted), the conversion result of the A/D converter is undefined. The
contents of ADi registers irrelevant to A/D conversion may also become undefined. If while A/D conversion is underway the ADST bit is cleared to 0 in a program, ignore the values of all ADi registers.
10. When setting the ADST bit in the ADCON register to 0 and terminating forcefully by a program in
single sweep conversion mode, A/D delayed trigger mode 0 and A/D delayed trigger mode 1 during
A/D converting operation, the A/D interrupt request may be generated. If this causes a problem, set the
ADST bit to 0 after an interrupt is disabled.
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22. Usage Notes
M16C/29 Group
22.10 Multi-Master I2C bus Interface
22.10.1 Writing to the S00 Register
When the start condition is not generated, the SCL pin may output the short low-signal ("L") by setting the
S00 register. Set the register when the SCL pin outputs an "L" signal.
22.10.2 AL Flag
When the arbitration lost is generated and the AL flag in the S10 register is set to 1 (detected), the AL flag
can be cleared to 0 (not detected) by writing a transmit data to the S00 register. The AL flag should be
cleared at the timing when master geneates the start condition to start a new transfer.
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22. Usage Notes
M16C/29 Group
22.11 CAN Module
22.11.1 Reading C0STR Register
The CAN module on the M16C/29 Group updates the status of the C0STR register in a certain period.
When the CPU and the CAN module access to the C0STR register at the same time, the CPU has the
access priority; the access from the CAN module is disabled. Consequently, when the updating period of
the CAN module matches the access period from the CPU, the status of the CAN module cannot be
updated. (See Figure 22.5)
Accordingly, be careful about the following points so that the access period from the CPU should not
match the updating period of the CAN module:
(1) There should be a wait time of 3fCAN or longer (see Table 22.2) before the CPU reads the C0STR
register. (See Figure 22.6)
(2) When the CPU polls the C0STR register, the polling period must be 3fCAN or longer. (See Figure
22.7)
Table 22.2 CAN Module Status Updating Period
3fCAN period = 3 ✕ XIN (Original oscillation period) ✕ Division value of the CAN clock (CCLK)
(Example 1) Condition XIN 16 MHz CCLK: Divided by 1
3fCAN period = 3 ✕ 62.5 ns ✕ 1 = 187.5 ns
(Example 2) Condition XIN 16 MHz CCLK: Divided by 2
3fCAN period = 3 ✕ 62.5 ns ✕ 2 = 375 ns
(Example 3) Condition XIN 16 MHz CCLK: Divided by 4
3fCAN period = 3 ✕ 62.5 ns ✕ 4 = 750 ns
(Example 4) Condition XIN 16 MHz CCLK: Divided by 8
3fCAN period = 3 ✕ 62.5 ns ✕ 8 = 1.5 µs
(Example 5) Condition XIN 16 MHz CCLK: Divided by 16 3fCAN period = 3 ✕ 62.5 ns ✕ 16 = 3 µs
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22. Usage Notes
M16C/29 Group
fCAN
CPU read signal
Updating period of
CAN module
CPU reset signal
C0STR register
✕
b8: State_Reset bit
0: CAN operation
mode
1: CAN reset/initialization mode
✕
✕
✕
✕
✕: When the CAN module’s State_Reset bit updating period matches the CPU’s read
period, it does not enter reset mode, for the CPU read has the higher priority.
Figure 22.5 When Updating Period of CAN Module Matches Access Period from CPU
Wait time
CPU read signal
Updating period of
the CAN module
CPU reset signal
C0STR register
b8: State_Reset bit
0: CAN operation
mode
1: CAN reset/initialization mode
: Updated without fail in period of 3fCAN
Figure 22.6 With a Wait Time of 3fCAN Before CPU Read
CPU read signal
4fCAN
Updating period of
the CAN module
CPU reset signal
C0STR register
b8: State_Reset bit
0: CAN operation
mode
1: CAN reset/initialization mode
✕
✕: When the CAN module’s State_Reset bit updating period matches the CPU’s read
period, it does not enter reset mode, for the CPU read has the higher priority.
: Updated without fail in period of 4fCAN
Figure 22.7 When Polling Period of CPU is 3fCAN or Longer
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22. Usage Notes
M16C/29 Group
22.11.2 CAN Transceiver in Boot Mode
When programming the flash memory in boot mode via CAN bus, the operation mode of CAN transceiver
should be set to “high-speed mode” or “normal operation mode”. If the operation mode is controlled by the
MCU, CAN transceiver must be set the operation mode to “high-speed mode” or “normal operation mode”
before programming the flash memory by changing the switch etc. Tables 22.3 and 22.4 show pin connections of CAN transceiver.
Table 22.3 Pin Connections of CAN Transceiver (In case of PCA82C250: Philips product)
Standby mode
Rs pin (Note 1) “H”
CAN communication impossible
Connection
High-speed mode
“L”
possible
M16C/29
PCA82C250
M16C/29
PCA82C250
CTx0
TxD CANH
CTx0
TxD CANH
CRx0
RxD CANL
CRx0
RxD CANL
Port (2)
Rs
Port (2)
Rs
Switch ON
Switch OFF
Note 1: The pin which controls the operation mode of CAN transceiver.
Note 2: Connect to enabled port to control CAN transceiver.
Table 22.4 Pin Connections of CAN Transceiver (In case of PCA82C252: Philips product)
Sleep mode
Normal operation mode
_______
STB pin (Note 1) “L”
“H”
EN pin (Note 1) “L”
“H”
CAN communication impossible
possible
Connection
M16C/29
PCA82C252
M16C/29
CTx0
TxD CANH
CTx0
TxD CANH
CRx0
RxD CANL
CRx0
RxD CANL
Port (2)
STB
Port (2)
STB
Port (2)
EN
Port (2)
EN
Switch OFF
Note 1: The pin which controls the operation mode of CAN transceiver.
Note 2: Connect to enabled port to control CAN transceiver.
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Switch ON
22. Usage Notes
M16C/29 Group
22.12 Programmable I/O Ports
_____
1. If a low-level signal is applied to the SD pin when the IVPCR1 bit in the TB2SC register is set to 1
_____
(three-phase output forcible cutoff by input on SD pin enabled), the P72 to P75, P80 and P81 pins go to
a high-impedance state.
2. The input threshold voltage of pins differs between programmable input/output ports and peripheral
functions.
Therefore, if any pin is shared by a programmable input/output port and a peripheral function and the
input level at this pin is outside the range of recommended operating conditions VIH and VIL (neither
“high” nor “low”), the input level may be determined differently depending on which side—the programmable input/output port or the peripheral function—is currently selected.
3.When the SM32 bit in the S3C register is set to 1, the P32 pin goes to high-impedance state. When the
SM42 bit in the S4C register is set to 1, the P96 pin goes to high-imepdance state.
4. When the INV03 bit in the INVC0 register is 1(three-phase motor control timer output enabled), an "L"
_______ _____
input on the P85 /NMI/SD pin, has the following effect.
•When the TB2SC register IVPCR1 bit is set to 1 (three-phase output forcible cutoff by input on
_____
__
__
___
SD pin enabled), the U/ U/ V/ V/ W/ W pins go to a high-impedance state.
•When the TB2SC register IVPCR1 bit is set to 0 (three-phase output forcible cutoff by input on
_____
__
__
___
SD pin disabled), the U/ U/ V/ V/ W/ W pins go to a normal port.
Therefore, the P85 pin can not be used as programmable I/O port when the INV03 bit is set to 1.
_____
_______ _____
When the SD function isn't used, set to 0 (Input) in PD85 and pullup to H in the P85 /NMI/SD pin from
outside.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 445 of 458
22. Usage Notes
M16C/29 Group
22.13 Electric Characteristic Differences Between Mask ROM
and Flash Memory Version
Flash memory version and mask ROM version may have different characteristics, operating margin, noise
tolerated dose, noise width dose in electrical characteristics due to internal ROM, different layout pattern,
etc. When switching to the mask ROM version, conduct equivalent tests as system evaluation tests conducted in the flash memory version.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
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22. Usage Notes
M16C/29 Group
22.14 Mask ROM Version
22.14.1 Internal ROM Area
In the masked ROM version, do not write to internal ROM area. Writing to the area may increase power
consumption.
22.14.2 Reserved Bit
The b3 to b0 in addresses 0FFFFF16 are reserved bits. Set these bits to 11112.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
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22. Usage Notes
M16C/29 Group
22.15 Flash Memory Version
22.15.1 Functions to Inhibit Rewriting Flash Memory Rewrite
ID codes are stored in addresses 0FFFDF16, 0FFFE316, 0FFFEB16, 0FFFEF16, 0FFFF316, 0FFFF716,
and 0FFFFB16. If wrong data are written to theses addresses, the flash memory cannot be read or written
in standard serial I/O mode.
The ROMCP register is mapped in address 0FFFFF16. If wrong data is written to this address, the flash
memory cannot be read or written in parallel I/O mode.
In the flash memory version of MCU, these addresses are allocated to the vector addresses ("H") of fixed
vectors. The b3 to b0 in address 0FFFFF16 are reserved bits. Set these bits to 11112.
22.15.2 Stop Mode
When the MCU enters stop mode, execute the instruction which sets the CM10 bit to 1 (stop mode) after
setting the FMR01 bit to 0 (CPU rewrite mode disabled) and disabling the DMA transfer.
22.15.3 Wait Mode
When the MCU enters wait mode, excute the WAIT instruction after setting the FMR01 bit to 0 (CPU
rewrite mode disabled).
22.15.4 Low PowerDissipation Mode, On-Chip Oscillator Low Power Dissipation Mode
If the CM05 bit is set to 1 (main clock stop), the following commands must not be executed.
• Program
• Block erase
22.15.5 Writing Command and Data
Write the command code and data at even addresses.
22.15.6 Program Command
Write xx4016 in the first bus cycle and write data to the write address in the second bus cycle, and an auto
program operation (data program and verify) will start. Make sure the address value specified in the first
bus cycle is the same even address as the write address specified in the second bus cycle.
22.15.7 Operation Speed
When CPU clock source is main clock, before entering CPU rewrite mode (EW mode 0 or 1), select 10
MHz or less for BCLK using the CM06 bit in the CM0 register and bits CM17 to CM16 in the CM1 register.
Also, when CPU clock is f3(ROC) on-chip oscillator clock, before entering CPU rewrite mode (EW mode
0 or 1), set the ROCR3 to ROCR2 bits in the ROCR register to “divied by 4” or “divide by 8”.
On both cases, set the PM17 bit in the PM1 register to 1 (with wait state).
22.15.8 Instructions Inhibited Against Use
The following instructions cannot be used in EW mode 0 because the flash memory’s internal data is
referenced: UND instruction, INTO instruction, JMPS instruction, JSRS instruction, and BRK instruction
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
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22. Usage Notes
M16C/29 Group
22.15.9 Interrupts
EW Mode 0
• Any interrupt which has a vector in the variable vector table can be used providing that its vector is
transferred into the RAM area.
_______
• The NMI and watchdog timer interrupts can be used because the FMR0 register and FMR1 register
are initialized when one of those interrupts occurs. The jump addresses for those interrupt service
routines should be set in the fixed vector table.
_______
Because the rewrite operation is halted when a NMI or watchdog timer interrupt occurs, the rewrite
program must be executed again after exiting the interrupt service routine.
• The address match interrupt cannot be used because the flash memory’s internal data is referenced.
EW Mode 1
• Make sure that any interrupt which has a vector in the variable vector table or address match interrupt will not be accepted during the auto program period or auto erase period with erase-suspend
function disabled.
_______
• The NMI interrupt can be used because the FMR0 register and FMR1 register are initialized when
this interrupt occurs. The jump address for the interrupt service routine should be set in the fixed
vector table.
_______
Because the rewrite operation is halted when a NMI interrupt occurs, the rewrite program must be
executed again after exiting the interrupt service routine.
22.15.10 How to Access
To set the FMR01, FMR02, FMR11 or FMR16 bit to 1, set the subject bit to 1 immediately after setting to
0. Do not generate an interrupt or a DMA transfer between the instruction to set the bit to 0 and the
_______
instruction to set the bit to 1. Set the bit when the PM24 bit is set to 1 (NMI funciton) and an high-level (“H”)
_______
signal is applied to the NMI pin.
22.15.11 Writing in the User ROM Area
EW Mode 0
• If the power supply voltage drops while rewriting any block in which the rewrite control program is
stored, a problem may occur that the rewrite control program is not correctly rewritten and, consequently, the flash memory becomes unable to be rewritten thereafter. In this case, standard serial I/
O or parallel I/O mode should be used.
EW Mode 1
• Avoid rewriting any block in which the rewrite control program is stored.
22.15.12 DMA Transfer
In EW mode 1, make sure that no DMA transfers will occur while the FMR00 bit in the FMR0 register is set
to 0(during the auto program or auto erase period).
22.15.13 Regarding Programming/Erasure Times and Execution Time
As the number of programming/erasure times increases, so does the execution time for software commands (Program, and Block Erase).
The software commands are aborted by hardware reset 1, brown-out detection reset (hardware reset 2),
_______
NMI interrupt, and watchdog timer interrupt. If a software command is aborted by such reset or interrupt,
the affected block must be erased before reexecuting the aborted command.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 449 of 458
22. Usage Notes
M16C/29 Group
22.15.14 Definition of Programming/Erasure Times
"Number of programs and erasure" refers to the number of erasure per block.
If the number of program and erasure is n (n=100 1,000 10,000) each block can be erased n times.
For example, if a 2K byte block A is erased after writing 1 word data 1024 times, each to a different
address, this is counted as one program and erasure. However, data cannot be written to the same
adrress more than once without erasing the block. (Rewrite prohibited)
22.15.15 Flash Memory Version Electrical Characteristics 10,000 E/W cycle products (
Normal: U7, U9; T-ver./V-ver.: U7)
When Block A or B E/W cycles exceed 100, set the FMR17 bit in the FMR1 register to 1 (1 wait) to select
one wait state per block access for products U7 and U9. When the FMR17 bit is set to 1, one wait state is
inserted per access to Block A or B - regardless of the value of the PM17 bit. Wait state insertion during
access to all other blocks, as well as to internal RAM, is controlled by the PM17 bit - regardless of the
setting of the FMR17 bit.
To use the limited number of erasure efficiently, write to unused address within the block instead of
rewite. Erase block only after all possible address are used. For example, an 8-word program can be
written 128 times before erase becomes necessary.
Maintaining an equal number of erasure between Block A and B will also improve efficiency.
We recommend keeping track of the number of times erasure is used.
22.15.16 Boot Mode
An undefined value is sometimes output in the I/O port until the internal power supply becomes stable
_____________
when "H" is applied to the CNVSS pin and "L" is applied to the RESET pin.
When setting the CNVSS pin to "H", the following procedure is required:
____________
(1) Apply an "L" signal to the RESET pin and the CNVSS pin.
(2) Bring VCC to more than 2.7V, and wait at least 2 msec. (Internal power supply stable waiting time)
(3) Apply an "H" signal to the CNVSS pin.
____________
(4) Apply an "H" signal to the RESET pin.
When the CNVSS pin is “H” and RESET pin is “L”, P67 pin is connected to the pull-up resister.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
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22. Usage Notes
M16C/29 Group
22.16 Noise
Connect a bypass capacitor (approximately 0.1µF) across the VCC and VSS pins using the shortest and
thicker possible wiring. Figure 22.8 shows the bypass capacitor connection.
M16C/29 Group
VSS
VCC
Connecting Pattern
Connecting Pattern
Bypass Capacitor
Figure 22.8 Bypass Capacitor Connection
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 451 of 458
22. Usage Notes
M16C/29 Group
22.17 Instruction for a Device Use
When handling a device, extra attention is necessary to prevent it from crashing during the electrostatic
discharge period.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 452 of 458
Appendix 1. Package Dimensions
M16C/29 Group
Appendix 1. Package Dimensions
JEITA Package Code
P-LQFP64-10x10-0.50
RENESAS Code
PLQP0064KB-A
Previous Code
64P6Q-A / FP-64K / FP-64KV
MASS[Typ.]
0.3g
HD
*1
D
NOTE)
1.
*2"
2.
INCLUDE TRIM OFFSET.
c1
Reference
Symbol
c
E
*2
HE
p
D
E
A
HD
ZE
Terminal cross section
E
A
A1
Z
p
b1
c
c1
c
A1
A
A2
F
e
x
y
ZD
ZE
L
L1
L
L1
Detail F
JEITA Package Code
P-LQFP80-12x12-0.50
RENESAS Code
PLQP0080KB-A
Previous Code
80P6Q-A
Min Nom Max
9.9 10.0 10.1
9.9 10.0 10.1
11.8 12.0 12.2
11.8 12.0
1.7
0.05 0.1 0.15
0.15 0.20
0.18
0.09 0.145 0.20
0.125
0°
8°
0.5
0.08
0.08
1.25
1.25
0.35 0.5 0.65
1.0
MASS[Typ.]
0.5g
HD
*1
D
41
NOTE)
1. DIMENSIONS "*1" AND "*2"
0
2.
DIMENSION "*3" DOES NOT
INCLUDE TRIM OFFSET.
E
*2
HE
c1
1
Reference
Symbol
Terminal cross section
ZE
D
E
A
HD
E
20
A1
F
c
A2
A1
A
p
L
L1
Detail F
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 453 of 458
b1
c
c1
e
x
y
ZD
ZE
L
L1
Dimension in Millimeters
Min Nom Max
11.9 12.0 12.1
11.9 12.0 12.1
1.4
13.8 14.0 14.2
13.8 14.0 14.2
1.7
0.1 0.2
0
0.15 0.20 0.25
0.18
0.09 0.145 0.20
0.125
0°
10°
0.5
0.08
0.08
1.25
1.25
0.3 0.5 0.7
1.0
Appendix 2. Functional Comparison
M16C/29 Group
Appendix 2. Functional Comparison
Appendix 2.1 Difference between M16C/28 Group and M16C/29 Group (Normal-ver.) (1)
Item
Description
Clock
Generation
Circuit
M16C/28(Normal-ver.)
M16C/29(Normal-ver.)
Clock output function (function
of b1 to b0 bits in the CM0
register)
Not available (reserved bit)
Available (clock output function select
bit)
Function of the PRC0 bit
Enable to set the CM0, CM1, CM2,
POCR, PLC0 and PCLKR registers
Enable to set the CM0, CM1, CM2,
POCR, PLC0, PCLKR and CCLKR
registers
The IFSR20 bit setting in the
IFSR2A register
Set to 1
Set to 0
The b1 bit in the IFSR2A
register
Not available (reseved bit)
Interrupt cause switching bit (0: A/D
conversion, 1:key input)
The b2 bit in the IFSR2A
register
Not available (reseved bit)
Interrupt cause switching bit (0: CAN0
wake-up/ error)
Interrupt cause in the Interrupt
number 13
Key input interrupt
CAN0 error
Interrupt cause in the Interrupt
number 14
Key input interrupt
A/D, key input interrupt
Three-phase
Motor Control
Timer
Three-phase port switching
function (function of 035816)
Not available (reserved register)
Available (port function select register)
A/D
Number of A/D input pin
24 channels (excluding AN30 to AN32) 27 channels (including AN30 to AN32)
Delayed trigger mode 0
Not available in the 1st chip version
and chip version A
Available
Delayed trigger mode 1
Not available in the 1st chip version
and chip version A
Available
compatible to 2.0B
Not available (all related registers are
reserved registers)
Available (1 channel)
CRC
Calculation
Available (compatible to CRCCCITT and CRC-16 methods)
Not available (all related registers are
reserved registers)
Available (1 circuit)
Pin Function
2 pins (80-pin/85-pin package),
P93/AN24
62 pins (64-pin package)
P93/AN24/CTX
3 pins (80-pin/85-pin package),
P92/TB2IN
64 pins (64-pin package)
P92/AN32/TB2IN/CRX
4 pins (80-pin/85-pin package),
P91/TB1IN
1 pin (64-pin package)
P91/AN31/TB1IN
5 pins (80-pin/85-pin package),
P90/TB0IN
2 pins (64-pin package)
P90/AN30/TB0IN/CLKOUT
P93 in standard serial I/O
mode
CTX output
Protection
Interrupt
CAN module
Flash
Memory
I: Input
O: Output
I (other than 128 Kbyte version)
I/O (128 Kbyte version)
I/O: Input and output
NOTE:
1. Since the M16C/28 group uses the common emulator used in the M16C/29 group, all the functions are available for
M16C/28. When evaluating M16C/28 group, do not access to the SFR which is not built-in the M16C/28 gorup.
Refere to hardware manual for details and electrical characteristics.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 454 of 458
Appendix 2. Functional Comparison
M16C/29 Group
Appendix 2.2 Difference between M16C/28 and M16C/29 Group (T-ver./V-ver.) (1)
Item
Description
Protection
Interrupt
CAN module
Pin Function
I: Input
M16C/28(T-ver./V-ver.)
M16C/29(T-ver./V-ver.)
Function of the PRC0 bit
Enable to set the CM0, CM1, CM2,
POCR, PLC0 and PCLKR registers
Enable to set the CM0, CM1, CM2,
POCR, PLC0, PCLKR and CCLKR
registers
The IFSR20 bit setting in the
IFSR2A register
Set to 1
Set to 0
The b1 bit in the IFSR2A
register
Not available (reserved bit)
Interrupt cause switching bit (0: A/D
conversion, 1:key input)
The b2 bit in the IFSR2A
register
Not available (reserved bit)
Interrupt cause switching bit (0: CAN0
wake-up/ error)
Interrupt cause in the Interrupt
number 13
Key input interrupt
CAN0 error
Interrupt cause in the Interrupt
number 14
Key input interrupt
A/D, key input interrupt
compatible to 2.0B
Not available (all related registers are
reserved registers)
Available (1 channel)
2 pins (80-pin/85-pin package),
62 pins (64-pin package)
P93/AN24
P93/AN24/CTX
3 pins (80-pin/85-pin package),
64 pins (64-pin package)
P92/TB2IN
P92/AN32/TB2IN/CRX
O: Output
I/O: Input and output
NOTE:
1. Since the M16C/28 group uses the common emulator used in the M16C/29 group, all the functions are available for
M16C/28. When evaluating M16C/28 group, do not access to the SFR which is not built-in the M16C/28 gorup.
Refere to hardware manual for details and electrical characteristics.
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 455 of 458
Register Index
M16C/29 Group
Register Index
A
AD0 to AD7 226
ADCON0 to ADCON2 224
ADIC 76
ADSTAT0 226
ADTRGCON 225
AIER 88
F
FMR0 341
FMR1 341
FMR4 342
B
BCNIC 76
BTIC 76
G
C
G1BCR0 142
G1BCR1 143
G1BT 142
G1BTRR 144
G1DV 143
G1FE 148
G1FS 148
G1IE0 150
G1IE1 150
G1IR 149
G1PO0 to G1PO7 147
G1POCR0 to G1POCR7 146
G1TM0 to G1TM7 146
G1TMCR0 to G1TMCR7 145
G1TPR6 to G1TPR7 145
C01ERRIC 76
C01WKIC 76
C0AFS 299
C0CONR 297
C0CTLR 293
C0ICR 296
C0IDR 296
C0MCTLj 292
C0RECIC 76
C0RECR 298
C0SSTR 295
C0STR 294
C0TECR 298
C0TRMIC 76
C0TSR 299
CCLKR 53
CM0 49
CM1 50
CM2 51
CPSRF 105, 118
CRCD 314
CRCIN 314
CRCMR 314
CRCSAR 314
I
ICOC0IC 76
ICOC1IC 76
ICTB2 129, 130
IDB0 129
IDB1 129
IFSR 77, 85
IFSR2A 77
IICIC 76
INT0IC to INT2IC 76
INT3IC 76
INT4IC 76
INT5IC 76
INVC0 127
INVC1 128
D
D4INT 40
DAR0 95
DAR1 95
DM0CON 94
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
DM0IC 76
DM0SL 93
DM1CON 94
DM1IC 76
DM1SL 94
DTT 129
page 456 of 458
Register Index
M16C/29 Group
S4BRG 218
S4C 218
S4D0 262
S4IC 76
S4TRR 218
SAR0 95
SAR1 95
SCLDAIC 76
K
KUPIC 76
N
NDDR 327
O
ONSF
105
T
P
TA0 to TA4 104
TA0IC to TA4IC 76
TA0MR to TA4MR 103
TA11 130
TA1MR 133
TA2 130
TA21 130
TA2MR 133
TA4 130
TA41 130
TA4MR 133
TABSR 104, 118, 132
TB0 to TB2 118
TB0IC to TB2IC 76
TB0MR to TB2MR 117
TB2 132
TB2MR 133
TB2SC 131, 227
TCR0 95
TCR1 95
TPRC 139
TRGSR 105, 132
P0 to P3 324
P17DDR 327
P6 to P10 324
PACR 177, 326
PCLKR 52
PCR 326
PD0 to PD3 323
PD6 to PD10 323
PDRF 137
PFCR 139
PLC0 53
PM0 44
PM1 44
PM2 45, 52
PRCR 69
PUR0 to PUR2 325
R
RMAD0 88
RMAD1 88
ROCR 50
ROMCP 336
U
S
U0BRG to U2BRG 174
U0C0 to U2C0 176
U0C1 to U2C1 177
U0MR to U2MR 175
U0RB to U2RB 174
U0TB to U2TB 174
U2SMR 178
U2SMR2 178
U2SMR3 179
U2SMR4 179
UCON 176
UDF 104
S00 258
S0D0 257
S0RIC to S2RIC 76
S0TIC to S2TIC 76
S10 260
S1D0 259
S20 258
S2D0 263
S31C 76
S3BRG 218
S3C 218
S3D0 261
S3TRR 218
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
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Register Index
M16C/29 Group
V
VCR1 39
VCR2 39
W
WDC 90
WDTS 90
Rev. 1.12 Mar.30, 2007
REJ09B0101-0112
page 458 of 458
REVISION HISTORY
Rev.
M16C/29 Hardware Manual
Date
Description
Summary
Page
0.70 Mar/ 29/Y04
1
2, 3
8, 9
10
22
28
30
31
32
36
37
38
39
40
41
42
45
46
54
57
64
65
66
67
68
73
74
94
102
106
111
112
115
117
119
“1. Overview” and “1.1. Application” are partly revised.
Table 1.2.1 and 1.2.2 are partly revised.
Figure 1.5.1 and 1.5.2 are partly revised.
Table 1.6.1 is revised.
Figure 4.8 is partly revised.
Section “5.5 Voltage Detection Circuit” and Figure 5.5.2 are partly revised.
Figure 5.5.3 is partly revised.
Figure 5.5.4 is partly revised.
Section “5.5.1 Voltage Detection Interrupt” and “5.5.1.1.1 Limitations of Stop
Mode” are partly revised.
Figure 7.1 is partly revised.
Figure 7.2 is partly revised.
Figure 7.3 is partly revised.
Figure 7.5 is partly revised.
Figure 7.6 is partly revised.
“CCLKR register” of Figure 7.7 is partly revised.
Section “7.1 Main clock” is partly revised.
Figure 7.4.1 is partly revised.
Section “7.5 CPU Clock and Peripheral Function Clock” and “7.5.2 Peripheral
Function Clock” are partly revised.
Section “7.7 System Clock Protective Function” and “7.8 Oscillation Stop and Reoscillation Detect Function” are partly revised.
Figure 8.1 is partly revised.
Figure 9.3.1 is partly revised.
IFSR2A registerin Figure 9.3.2 is partly revised.
Section “9.3.2 IR Bit” is partly revised.
Section “9.4 Interrupt Sequence” is partly revised.
Section “9.4.1 Interrupt Response Time” and Figure9.4.1.1 are partly revised.
Section “9.6 INT Interrupt” is partly revised.
Section “9.9 CAN0 Wake-up Interrupt” is partly revised.
“Divide ratio” of Table 12.1.1.1 is partly revised.
“8-bit PWM” of Table 12.1.4.1 is partly revised.
“Timer Bi register” in Figure 12.2.3 is partly revised.
Section “12.2.4 A-D Trigger mode” and Table 12.2.4.1 are partly revised.
Figure 12.2.4.2 is partly revised.
Figure 12.3.2 is partly revised.
“Timer B2 interrupt occurences fequency set counter” in Figure 12.3.4 is partly
revised.
Figure 12.3.6 is partly revised.
C-1
REVISION HISTORY
Rev.
M16C/29 Hardware Manual
Date
Description
Summary
Page
122
125
126
“Figure 12.3.9 PFCR register and TPRC register” is deleted.
Figure 12.3.1.2.1 and the section 12.3.1.2.4 are partly revised.
Section “Three-phase/Port Output Switch Function” and “Figure 12.3.2.1 PFCR
register and TPRC register” are added.
166
“UART 2 special mode register 2” in Figure 14.1.8 is partly revised.
167
“UART 2 special mode register 3” in Figure 14.1.9 is partly revised.
210
Note 1 in Table 15.1.1.1 is deleted.
213
Figure 15.4 is partly revised.
214
Figure 15.5 is partly revised.
219
Section “15.1.3 Single Sweep mode” is partly revised.
221
Section “15.1.4 Repeat Sweep mode 0” is partly revised.
223
Section “15.1.5 Repeat Sweep mode 1” is partly revised.
225
Section “15.1.6 Simultaneous Sample Sweep Mode”, Table 15.1.6.1, and Figure
15.1.6.1 are partly revised.
228
Section “15.1.7 Delayed Trigger Mode 0” and Table 15.1.7.1 are partly revised.
229
Figure 15.1.7.1 is partly revised.
230, 231 Figure 15.1.7.2 and 15.1.7.3 are partly revised.
232
Figure 15.1.7.3 is deleted.
235
Section “15.1.8 Delayed Trigger Mode 1” and Table 15.1.8.1 are partly revised.
241
Figure 15.5.1 is partly revised.
276 to 300 Chapter “17. CAN Module” is revised.
301
Chapter “18. CRC Calculation Circuit” is partly revised.
303
Figure 18.3 is partly revised.
304
Chapter “19. Programmable I/O ports” is partly revised.
305
Section “19.5 Pin Assignment Control Register” is partly revised.
313
“Pull-up control register” in Figure 19.3.1 is partly revised.
320
Table 20.4 and 20.5 and Note 6 and 10 are partly revised.
321
Note 3 in Table 20.6 is added.
342
Table 20.43 and 20.44 and Note 10 are partly revised.
343
Note 3 in Table 20.45 is added.
360 to 372 Section “20.3 V version” is deleted.
373
Table 21.1 is partly revised.
282
Section “•FMR01 Bit”, “•FMR02 Bit” and “•FMSTP Bit” are partly revised.
383
Section “•FMR16 Bit”, “• FMR17 Bit” and “FMR41 Bit” are partly revised.
384
Figure 21.5.1 is revised.
387
Figure 21.5.1.3 is partly revised.
392
Section “21.4.2 EW1 Mode” is partly revised.
Section “21.6.4 How to Access” is partly revised.
Section “21.7.5. Block Erase” is partly revised.
C-2
REVISION HISTORY
Rev.
M16C/29 Hardware Manual
Date
Description
Summary
Page
399
400
403
404
405
406
407
0.71 April/15/Y04 B-1 to B-3
B-4, B-5
2,3
6,7
14
15 to 20
21, 22, 25
29
33
34
40
64
65
112
119
126
130
134
137
162
170
177
184
214
230, 231
233
235
236, 237
240
244
321
342
Figure 21.9.1 is partly revised.
Figure 21.9.2 is partly revised.
Section “21.10.1 ROM Code Protect Function” is partly revised.
Section “21.11.1 ROM Code Protect Function” is partly revised.
Table 21.11.1 is revised.
Figure 21.11.1 is revised.
Figure 21.11.2 is revised.
Figure 21.11.3 is revised.
“Quick Reference to Page Classified by Address” are revised.
“Quick Reference to Page Classified by Address” are partly revised.
Table 1.2.1 and Table 1.2.2 is partly revised.
Table 1.4.1 to 1.4.3 is partly revised.
Not e2 in Figure 3.1 is added.
Figure 4.1 to Figure 4.6 are revised.
Figure 4.7, Figure 4.8 and Figure 4.11 are partly revised.
Section “5.5 Voltage Detection Circuit” is partly revised.
Figure 5.5.1.1.2.1 is partly revised.
Figure 6.2 is partly revised.
The PM2 register in Figure 7.6 is partly revised.
Figure 9.3.1 is partly revised.
The IFSR2A register in Figure 9.3.2 is partly revised.
Figure 12.2.4.2 is partly revised.
Figure 12.3.6 is partly revised.
Section “12.3.2 Three-phase/Port Output Switch Function” is revised. Figure
“12.3.2.1. Usage Example of Three-phse/Port output switch function” is added.
Figure 13.2 is partly revised.
Figure 13.6 is partly revised.
Figure 13.10 is partly revised.
“UARTi receive buffer register” in Figure 14.1.4 is partly revised.
Table 14.1.1.2 is partly revised.
Table 14.1.2.2 is partly revised.
Figure 14.1.3.1 is partly revised.
Figure 15.5 is partly revised.
Figure 15.1.7.2 and Figure 15.1.7.3 are partly revised.
Figure 15.1.7.5 is partly revised.
Section “15.1.8 Delayed Trigger Mode 1” is partly revised.
Figure 15.1.8.2 and Figure 15.1.8.3 are partly revised.
Section “15.3 Sample and Hold” and Figure 15.5.1 are partly revised.
Figure 16.2 is partly revised.
Table 20.4 and Table 20.5 are partly revised.
Table 20.43 and Table 20.44 are partly revised.
C-3
REVISION HISTORY
Rev.
M16C/29 Hardware Manual
Date
Description
Summary
Page
360
368
0.80 Sep/03/Y04
2,3
6,7
7
8,9
21
24
26
29 to 34
80
322
323
325
327
331
335
339
343
344
346
Table 21.1 is partly revised.
Section “21.4.2 EW1 Mode” is partly revised.
Table 1.2.1 and Table 1.2.2 are partly revised.
Table 1.4.1 to Table 1.4.3 are partly revised.
Figure 1.4.1 is partly revised.
Figure 1.5.1 and Figure 1.5.2 are partly revised.
Figure 4.7 is partly revised.
Figure 4.10 is partly revised.
Section “5.1.2 Hardware Reset 2” is partly revised.
Section “5.5 Voltage Detection Circuit” is revised.
Section “10.2 Cold start / Warm start” is added.
Table 20.2 is partly revised.
Table 20.3 is partly revised.
Table 20.6 and Table 20.7 are partly revised.
Table 20.9 is partly revised.
Title of Table 20.23 is partly revised.
Table 20.25 is partly revised.
Title of Table 20.39 is partly revised.
Table 20.41 is partly revised.
Table 20.42 is partly revised.
“Low Voltage Detection Circuit Electrical Characteristics” is deleted.
Talbe 20.45 is partly revised.
348
Table 20.47 is partly revised.
352
Title of Table 20.61 is partly revised.
356
Talbe 20.63 is partly revised.
360
Title of Table 20.77 is partly revised.
398
64P6Q-A package is revised.
1.00 Nov/01/Y04 All pages Words standardized (on-chip oscillator, A/D)
2, 3
Table1.2.1 and Table 1.2.2 are partly revised.
8, 9
Table 1.4.4 to 1.4.6 and figure1.4.2 to 1.4.6 are added.
28
“5.1.2 Hardware Reset 2” is partly revised.
29
“5.4 Oscillation Stop Detection Reset” is partly revised.
38
Table 7.1 is partly revised.
41
Note 6 in Figure 7.3 is partly revised. b7 to b4 bit in Figure 7.4 is revised.
42
Figure 7.5 is partly revised.
43
“PCLKR register” in Figure 7.6 is partly revised.
50
“7.6.1 Normal Operation Mode” is partly revised.
51
Note 1 in Table 7.6.1.1 is partly revised.
57
“7.8 Oscillation Stop and Re-oscillation Detect Function” is partly revised.
C-4
REVISION HISTORY
Rev.
Date
1.10
10/10/06
M16C/29 Hardware Manual
Description
Page
Summary
66
“9.3 Interrupt Control” is partly revised.
______
_______
76
“9.6 INT Interrupt” and “9.7 NMI Interrupt” are partly revised.
77
“9.8 Key Input Interrupt” and “9.9 CAN0 Wake-up Interrupt” are partly revised.
80
“10. Watchdog Timer” is partly revised.
80, 81 “10.1 Count source protective mode” is partly revised.
81
Note 2 in Figure 10.2 is revised.
118
Figure 12.3.1 is partly revised.
121
“Three-phase output buffer register” in Figure 12.3.4 is partly revised.
133 to 138 Figure 13.1 to 13.6 are partly revised.
141
“Function enable register” in Figure 13.9 is partly revised.
150
Table 13.4.1 is partly revised.
161
“13.6 I/O Port Function Select” is partly revised.
198
Figure 14.1.4.1 is partly revised.
209
Figure 14.2.1 is partly revised.
210
Figure 14.2.2 is partly revised.
214
“Integral Nonlinearity Error” in Table 15.1 is partly revised.
253,254 Figure 16.6 and Figure 16.7 are partly revised.
261
“16.5.4 Bit 3: Arbitration lost detection flag” is partly revised.
266
“16.6.5 I2C system clock select bits” and Talbe 16.6 are partly revised.
275
“9)” in “16.13.2 Example of Slave Receive” is revised.
296
“17.3 Configuration of the CAN Module System Clock” is partly revised.
306
“18.1 CRC snoop” is partly revised.
337
Table 20.25 is partly revised.
368
“21.1 Flash Memory Performance” is partly revised.
367,368 “21.2 Memory Map” is partly revised.
372
“21.4 CPU Rewrite Mode” is partly revised.
373
“21.4.1 EW0 Mode” and “21.4.2 EW1 Mode” are partly revised.
374
“FMR01 Bit” is partly revised.
375
“FMR17 Bit” is partly revised.
383
“21.7.4 Program Command (4016)” is partly revised.
390
Table 21.9.1 and Note 2 are partly revised.
391,392 Figure 21.9.1 and Figure 21.9.2 are partly revised.
393,394 Figure 21.9.2.1 and Figure 21.9.2.2 are partly revised.
396
Table 21.11.1 and Note 1 are partly revised.
397,398 Figure 21.11.1 and Figure 21.11.2 are partly revised.
399
Figure 21.11.3 is partly revised.
All Pages Package code changed: 80P6Q-A to PLQP0080KB-A, 64P6Q-A to PLQP0064KB-A
Words standardized: Low voltage detection, CPU clock, MCU, SDA2, SCL2
C-5
REVISION HISTORY
Rev.
M16C/29 Hardware Manual
Date
Description
Summary
Page
2
4-5
6-7
8
9
13 - 17
18
23
24 - 34
24
35
38
44
45
46
47
48
50
52
54
55
59
60
61
Overview
• Table 1.1 and 1.2 Performance Outline Voltage detection circuit are modified,
note 3 is modified
• Figure 1.1 and 1.2 Block Diagrams are updated
• Table 1.3 to 1.5 Product Lists are updated
• Figure 1.3 Produt Numbering System is modified
• Tables 1.6 to 1.8 Product Code B3, B7, D3, D5, D7, D9 are deleted
• Tables 1.9 to 1.11 Product Code Mask ROM versions are newly added
• Table 1.9 and 1.10 Pin Characteristics for 80-, and 64-pin Packages are added
• Table 1.11 Pin Description Tables are modified
Memory
• Figure 3.1 Memory Map 48Kbyte memory size is deleted
Special Function Register
• Table 4.1 to 4.11 SFR Information values after reset
• Table 4.1 SFR Information(1) Note 3 is deleted
Reset
• 5.1.2 Hardware Reset 2 Note is modified, description is modified
• 5.5 Voltage Dection Circuit modified
• Figure 5.4 Voltage Detection Circuit Block modified, WDC5 bit circuit deleted
Processor Mode
• Figure 6.1 PM1 Register Note 2 information partially added
• Figure 6.2 PM2 Register added
• Figure 6.3 Bus Block Diagram and Table 6.1 Accessible Area and Bus
Cycle added
Clock Generation Circuit
• Table 7.1 Clock Generation Circuit Specifications Oscillation stop, restart
function modified
• Figure 7.1 Clock Generation Circuit Upper portion of figure is modified
• Figure 7.4 ROCR Register Bit conents are modified
• Figure 7.6 PCLKR Register and PM2 Register Note 2 is modified
• Figure 7.8 Examples of Main Clock Connection Circuit is modified
• Figure 7.9 Examples of Sub Clock Connection Circuit is modified
• 7.5.2 Peripheral Function Clock (f1, f2, f8, f32, f1SIO, f2SIO, f8SIO, f32SIO,
fAD, fc32, fCAN0) revised
• 7.6.1 Normal Operation Mode Information is modified
• Table 7.4 Setting Clock Related Bit and Modes Multi-master I2C bus interrupt
and Timer S interrupt added
• Table 7.5 Pin Status in Wait Mode newly added
• Table 7.6 Interrupts to Exit Wait Mode modified
C-6
REVISION HISTORY
Rev.
Date
M16C/29 Hardware Manual
Description
Page
Summary
63
• Figure 7.11 State Transition to Stop Mode and Wait Mode modified, Note 7 is added
64
• Figure 7.12 State Transition in Normal Mode modified, note 5 deleted, note 6
and 7 are simplified
65
• Table 7.7 Allowed Transition and Setting note 2 partially modified, table con
tents are partially modified
68
• Figure 7.13 Procedure to Switch Clock Source From On-chip Oscillator
Clock to Main Clock is modified
Interrupt
70
• Note is newly added
73
• Table 9.1 Fixed Vector Tables Note 2 is added
Watchdog Timer
89
• Additional information of the WDTS register is inserted
90
• Figure 10.1 Watchdog Timer Block Diagram modified
• Figure 10.2 WDC Register and WDTS Register All notes are deleted
• 10.2 Cold Start/Warm Start Section is deleted
DMAC
96
• Note is added
Timer
105
• Figure 12.6 TRGSR Register Note 2 added
117
• 12.2 Timer B Description of A/D trigger mode modified
• Figure 12.15 Timer B Block Diagram “A/D trigger mode” is added
123
• 12.2.4 A/D Trigger Mode Description modified
129
• Figure 12.28 IDB0 Register, IDB1 Register, DTT Register, and ICTB2 Register Information of bit 7 and 6 modified
131
• Figure 12.30 TB2SC Register Note 4 added, contents modified
133
• Figure 12.32 TA1MR Register, TA2MR Register, TA4MR Register MR0 bit is
modified
134
• Figure 12.33 Triangular Wave Modulation Operation Description modified
135
• Figure 12.34 Sawtooth Wave Modulation Operation Description modified
139
• Figure 12.38 TPRC Register Bit map is modified
Timer S
142
• Figure 13.2 G1BT and G1BCR0 Registers Function of G1BT register modified,
note 3 is added, function of bits 5 to 3 modified, description patially modified
143
• Figure 13.3 G1BCR1 Register Note 1 is partially added
146
• Figure 13.6 G1TM0 to G1TM7 Registers Note 3 and 4 are added
151-166 • Table 13.2, 13.5, 13,8, 13.9 and 13.10 Output wave form and Selectable function are modified
155
• Figure 13.15 Base Timer Reset Operation by Base Timer Reset Register
Base timer overflow request line is added, base timer interrupt line is modified,
C-7
REVISION HISTORY
Rev.
M16C/29 Hardware Manual
Date
Description
Summary
Page
160
166
167
168
170
171
174
175
176
177
180
182
183
184
185
186
187
188
190
192
193
195
196
note 1 is added
• Figure 13.21 Prescaler Function and Gate Function Note 1 modified
• Table 13.10 SR Waveform Output Mode Specifications Specification modified
• Figure 13.24 Set/Reset Waveform Output Mode Description for (1) Free-running operation modified, register names modified
• Table 13.11 Pin Setting for Time Measurement and Waveform Generating
Functions Description of port direction modified
Serial I/O
• Note is modified
• Figure 14.1 Block Diagram of UARTi (i = 0 to 2) PLL clock is added to the
upper portion of diagram
• Figure 14.4 U0TB to U2TB, U0RB to U2RB, U0BRG to U2BRG Registers
Note 2 is modified, note 3 is newly added
• Figure 14.5 U0MR Register, U1MR Register Bit map is modified
• Figure 14.6 U0C0 Register Note 3 modified, Note 4 to 7 are added
• Figure 14.6 U2C0 Register Note 2 is added
• Figure 14.7 PACR Register added
• Table 14.1 Clock Synchronous Serial I/O Mode Specifications Select function modified, note 2 modified
• Table 14.3 Pin Functions Note 1 added
• Table 14.4 P64 Pin Functions Note 1 added
• Figure 14.10 Typical transmit/receive timings in clock synchronous serial I/
O mode Example of receive timing: figure modified
• 14.1.1.1 Counter Measre for Communication Error Occurs newly added
• 14.1.1.2 CLK Polarity Select Function Newly added
• Figure 14.14 Transfer Clock Output From Multiple Pins Note 2 added
_______ _______
• 14.1.1.7 CTS/RTS separate function (UART0) modified
• Figure 14.15 CTS/RTS Separate Function Usage Note 1 added
• Table 14.5 UART Mode Specifications Select function modified, note 1 modified
• Table 14.7 I/O Pin Functions in UART Mode Note 1 added
• Table 14.8 P64 Pin Functions in UART Mode Note 2 added
________
• Figure 14.17 Receive Operation RTSi line is modified
• 14.1.2.1 Bit Rates newly added
• Table 14.9 Example of Bit Rates and Settings newly added
• 14.1.2.2 Counter Measure for Communication Error newly added
• 14.1.2.6 CTS/RTS Separate Function (UART0) P70 pin is added
• Figure 14.21 CTS/RTS Separate Function Note 1 added
• Table 14.10 I2C mode Specifications Note 2 modified
C-8
REVISION HISTORY
Rev.
M16C/29 Hardware Manual
Date
Description
Summary
Page
214
217
218
220
221
222
224
227
229
231
233
235
237
239
241
245
251
254
255
256
257
• Figure 14.31 Transmit and Received Timing in SIM Mode partially modified
• 14.2 SI/O3 and SI/O4 Note added
• Figure 14.36 S3C and S4C Registers Note 5 is added
• Figure 14.36 S3BRG and S4BRG Registers Note 3 is added
• Figure 14.38 Polarity of Transfer Clock figure modified
• 14.2.3 Functions for Setting an SOUTi Initial Value Description modified
A/D Converter
• Note added
• Table 15.1 A/D Converter Performance Integral Nonlinearity Error modified
• Figure 15.2 ADCON2 Registers b2-b1 function modified
• Figure 15.5 TB2SC Register Reserved bit map modified
• Figure 15.7 ADCON0 to ADCON2 Registers in One-shot Mode ADCON2
register: b2-b1 function modified
• Figure 15.9 ADCON0 to ADCON2 Registers in Repeat Mode ADCON2 register: b2-b1 function modified
• Figure 15.11 ADCON0 to ADCON2 Registers in Single Sweep Mode
ADCON2 register: b2-b1 function modified
• Figure 15.13 ADCON0 to ADCON2 Registers in Repeat Sweep Mode 0
ADCON2 register: b2-b1 function modified
• Figure 15.15 ADCON0 to ADCON2 Registers in Repeat Sweep Mode 1
ADCON2 register: b2-b1 function modified
• Figure 15.17 ADCON0 to ADCON2 Registers in Simultaneous Sample
Sweep Mode ADCON2 register: b2-b1 function modified
• Table 15.10 Delayed Trigger Mode 1 Specifications Note 1 is modified
• Figure 15.22 ADCON0 to ADCON2 Registers in Delayed Trigger Mode 0
ADCON2 register: b2-b1 function modified
• Figure 15.27 ADCON0 to ADCON2 Registers in Delayed Trigger Mode 1
ADCON2 register: b2-b1 function modified
• 15.5 Analog Input Pin and External Sensor Equivalent Circuit Example is
deleted
• 15.5 Output Impedance of Sensor under A/D Conversion is added
• Figure 15.29 Analog Input Pin and External Sensor Equivalent Circuit Note
1 is added
• Precaution of Using A/D Converter deleted
Multi-master I2C bus INTERFACE
• Table 16.1 Multi-master I2C bus Interface Functions I/O pin added
• Figure 16.1 Block Diagram of Multi-master I2C bus Interface Bit name and
register name are modified
• Figure 16.2 S0D0 Register Bit map is modified
C-9
REVISION HISTORY
Rev.
M16C/29 Hardware Manual
Date
Description
Summary
Page
258
259
260
262
269
270
271
276
279
• Figure 16.3 S00 Register Note is modified
• Figure 16.4 S1D0 Register Reserved bit map modified
• Figure 16.5 S10 Register b7-b6 modified
• Figure 16.7 S4D0 Register Bit reserved map is modified
• 16.5.1 Bit 0: Last Receive Bit (LRB) modified
• 16.5.2 Bit 1: General call detection flag (ADR0) modified, note 1 modified
• 16.5.3 Bit 2: Slave address comparison flag (AAS) modified
• 16.5.5 Bit 4: I2C Bus Interface Interrupt Request Bit (PIN) modified
• 16.5.6 Bit 5: Bus Busy Flag (BB) Bit names are modified
• 16.5.8 Bit 7: Communication Mode Select bit (MST) modified
• 16.7.1 Bit0: Time-Out Detection Function Enable Bit (TOE) is modified
• 16.7.5 Bit7: STOP Condition Detection Interrupt Request Bit (SCPIN) is
modified
• 16.11 Stop Condition Generation Method Description added
282
• 16.13 Address Data Communication modified
CAN Module
292
• Figure 17.6 C0MCTLj Register RspLock bit’s name changed, note 2 revised
293
• Figure 17.7 C0CTLR Register Note 4 added, functions partially modified
294
• Figure 17.8 C0STR Register Note 1 deleted, functions partially modified
298
• Figure 17.13 C0RECR Register Note 2 deleted, note 1 partially modified
• Figure 17.14 C0TECR Register Note 1 modified, note is relocated
299
• Figure 17.15 C0TSR Register Note 1 modified
300
• Figure 17.17 Transition Between Operational Modes Partially modified
301
• 17.2.3 CAN Sleep Mode Partially deleted
304
• Table 17.2 Example of Bit-Rate 24-MHz is deleted
308
• 17.8 Time Stamp Counter and Time Stamp Function Partially deleted
310
• Figure 17.25 Timing of Receive Data Frame Sequence IF to IFS
311
• Figure 17.26 Timing of Transmit Sequence IF to IFS
CRC Calculation Circuit
313
• 18.1 CRC Snoop Description partially added
Programmable I/O Ports
316
• Note added
• 19.3 Pull-up Control Register 0 to 2 Description partially added
317
• 19.6 Digital Debounce Function Filter width formula modified
318-321 • Figure 19.1 I/O Ports (1) to Figure 19.4 I/O Ports (4) are modified
326
• Figure 19.10 PACR Register Note 1 is modified
327
• Figure 19.11 NDDR and P17DDR Register Functions modified, notes are added
328
• Figure 19.12 Functioning of Digital Debounce Filter modified, procedure note
modified
C-10
REVISION HISTORY
Rev.
M16C/29 Hardware Manual
Date
Description
Summary
Page
329
330
331
332
335
336
337
339
340
341
342
345
346
352
355
366
367
368
369
370
372
380
387
• Table 19.1 Unassigned Pin Handling in Single-chip Mode Note 5 added
Flash Memory Version
• 20.1 Flash Memory Performance Description partially deleted
• Table 20.14 Flash Memory Version Specifications Note 3 added
• 20.1.1 Boot Mode added
• 20.2 Memory Map Description is modified
• 20.3.1 ROM Code Protect Function Description is modified
• Figure 20.4 ROMCP Address is modified
• Table 20.3 EW Mode 0 and EW Mode 1 Note 2 is modified
• 20.5.1 Flash Memory Control Register 0 FMR01 Bit and FMR02 Bit: description is modified
• 20.5.2 Flash Memory Control Register 1 (FMR1) FMR6 Bit is modified,
FMR17 Bit is modified
• Figure 20.6 FMR0 and FMR1 Registers FMR0 register: note 3 modified, value
after reset modified; FMR1 register: note 3 modified, reserved bit map modified
• Figure 20.7 FMR4 Register Note 2 is modified
• 20.6.3 Interrupts EW1 mode modified
• 20.6.4 How to Access FMR16 bit is added
• 20.6.9 Stop Mode modified
• Table 20.7 Errors and FMR0 Register Status Register name modified
• Table 20.8 Pin Functions Pin settings are partially modified
Electrical Characteristics
• V version is newly added
• Table 21.1 Absolute Maximum Ratings Parameters of Pd and Topr are modified
• Table 21.2 Recommended Operating Conditions VIH and VIL are modified
• Table 21.3 A/D Conversion Characeristics tSAMP deleted, note 4 added
• Table 21.4 Flash Memory Version Electrical Characteristics: Standard values of Program and Erase Endrance cycle modified, tps added
• Table 21.5 Flash Memory Version Electrical Characteristics: tps added, data
hold time added, note 1, 3, 8 modified, note 11 and 12 added
• Table 21.6 Low Voltage Detection Circuit Electrical Characteristics Note 4
added
• Table 21.7 Power Supply Circuit from Timing CharacteristicsL Note 2 & 3
are deleted, figure modified
• Table 21.9 Electrical Characteristics(2) Note 5 is added
• Table 21.25 Electrical Characteristics(2) Note 5 is added
• Table 21.40 Absolute Maximum Ratings Parameters of Pd and Topr are modified
C-11
REVISION HISTORY
Rev.
M16C/29 Hardware Manual
Date
Description
Summary
Page
388
389
390
391
393
401
422
423
425
426
427
431
434
435
436
438
441
445
447
448
449
450
• Table 21.41 Recommended Operating Conditions VIH and VIL are modified
• Table 21.42 A/D Conversion Characeristics tSAMP deleted, note 4 added
• Table 21.43 Flash Memory Version Electrical Characteristics: Standard values of Program and Erase Endrance cycle modified, tps added
• Table 21.44 Flash Memory Version Electrical Characteristics: tps added,
data hold time added, note 1, 3, 8 modified, note 11 and 12 added
• Table 21.45 Power Supply Circuit from Timing CharacteristicsL Note 2 & 3
are deleted, td(S-R) and td(E-A) are deleted, figure modified
• Table 21.47 Electrical Characteristics(2) Note 4 is added
• Table 21.63 Electrical Characteristics(2) Note 4 is added
Precautions
• 22.2.1 PLL Frequency Synthesizer modified
• 22.2.2 Power Control Subsection sequence modified, 2., 3. and 4. information
modified
______
• 22.4.3 NMI Interrupt 2. information partially deleted, 6. information added
______
• 22.4.5 INT Interrupt 3. information added
• 22.4.6 Rewrite the Interrupt Control Register Example 1 is modified
• 22.6.1.3 Timer A (One-shot Timer Mode) 6. information added
• 22.6.3 Three-phase Motor Control Timer Function newly added
• 22.7.1 Rewrite the G1 IR Register description modified
• Figure 22.3 IC/OC Interrupt Flow Chart newly added
• 22.7.2 Rewrite the ICOCiIC Register newly added
• 22.7.3 Waveform Generating Function newly added
• 22.7.4 IC/OC Base Timer Interrupt newly added
• 22.8.2.1 Special Mode (I2C bus Mode) added
• 22.8.2.3 SI/O3, SI/O4 added
• 22.10 Multi-master I2C bus Interface added
• 22.12 Programmable I/O Ports 2. and 3. information modified
• 20.14 Mask ROM Version is added
• 22.15.1 Functions to Inhibit Rewriting Flash Memory Rewrite modified
• 22.15.2 Stop Mode modified
• 22.16.4 Low Power Disspation Mode, On-chip Oscillator Low Power Dissipation Mode modified
• 22.15.7 Operating Speed modified
• 22.15.9 Interrupts modified
• 22.15.13 Regarding Programming/Erasure Times and Execution Time
modified
• 22.15.14 Definition of Programming/Erasure Times added
• 22.15.15 Flash Memory version Electrical Characteristics 10,000 E/W cycle
C-12
REVISION HISTORY
Rev.
M16C/29 Hardware Manual
Date
Description
Summary
Page
products (U7, U9) added
• 22.15.16 Boot Mode added
451
• 22.16 Noise added
452
• 20.17 Instruction fo Device Use added
Appendix 1. Package Dimensions
453
• Dimensions are updated
454-455 Appendix 2. Functional Comparison added
1.11 Dec.11,2006
Clock Generation Circuit
54
• Figure 7.8 Examples of Main Clock Connection Circuit Note 2 added
Interrupts
88
• Table 9.6 PC Value Saved in Stack Area When Address Match Interrupt
Request Is Acknowledged Table contents partially modified, note added
Serial I/O
198
• Table 14.11 Registers to Be Used and Settings in I2C bus Mode Note Relocated
CAN Module
297
• Figure 17.12 C0CONR Register Note 2 modified
Electrical Characteristics
372
• Table 21.9 Electrical Characteristics (2) Mask ROM data added, value partially changed: 420 to 450
379
• Table 21.24 Electrical Characteristics Note 1 modified
380
• Table 21.25 Electrical Characteristics Mask ROM data added, note 1 modified
391
• Table 21.45 Power Supply Circuit Timing Characteristics figure for td(P-R)
and td(ROC) added, Mask ROM data added
393
• Table 21.47 Electrical Characteristics (2) Mask ROM data added, value
paritally changed
400
• Table 21.62 Electrical Characteristics Note 1 modified
401
• Table 21.63 Electrical Characteristics Mask ROM data added, note 1 modified
412
• Table 21.83 Power Supply Circuit Timing Characteristics figure for td(P-R)
and td(ROC) added, Mask ROM data added
414
• Table 21.85 Electrical Characteristics (2) Mask ROM data added, value
paritally changed
Usage Notes
• Table numbers and Figure numbers are revised
421
• 22.1.3 Register Setting added
447
• 22.14.1 Internal ROM Area Description added
Overview
1.12 Mar.30, 2007
1
• 1.1 Features modified
2, 3
• note on trademark modified
C-13
REVISION HISTORY
Rev.
M16C/29 Hardware Manual
Date
Description
Summary
Page
9
19, 20
37
45
52
64
69
88
90
129
256
335
340
341
343
369
370
372
380
390
391
393
• Tables 1.6 to 1.8 Product Codes modified
• Table 1.14 Pin Description pin description on I/O ports modified
Reset
• Figure 5.2 Reset Sequence Vcc and ROC timings modified
Processor Mode
• Figure 6.2 PM2 Register Description on notes 5 and 6 modified
Clock Generation Circuit
• Figure 7.6 PM2 Register Description on notes 5 and 6 modified
• Figure 7.12 State Transition in Normal Mode note 2 modified
Protection
• Description on protection modified
• Figure 8.1 PRCR Register note 1 modified
Interrupts
• Table 9.6 PC Value Saved in Stack Area When Address Match Interrupt
Request I Acknowledged instruction modified
Watchdog Timer
• Figure10.2 WDTS Register modified
• 10.1 Count Source Protective Mode description modified
Timer
• Figure 12.28 ICTB2 Register modified
Multi-Master I2C bus Interface
• Figure 16.1 Block Diagram of Multi-Master I2C bus Interface modified
Flash Memory Version
• 20.3.1 ROM Code Protect Function register name modified
• 20.5.2 Flash Memory Control Register 1 description on FMR17 bit modified
• Figure 20.6 FMR1 Register note 2 modified
• Figure 20.9 Setting and Resetting of EW Mode 1 modified
Electrical Characteristics
• Table 21.5 Flash Memory Version Electrical Characteristics note 10 modified
• Timing figure for td(P-R) and td(ROC) modified
• Table 21.9 Electrical Characteristics parameter and measurement condition
modified, note 5 deleted
• Table 21.25 Electrical Characteristics measurement condition modified, note
5 deleted
• Tables 21.43 and 44 Flash Memory Version Electrical Characteristics note
10 modified
• Timing figure for td(P-R) and td(ROC) modified
• Table 21.47 Electrical Characteristics parameter and condition modified, note
C-14
REVISION HISTORY
Rev.
M16C/29 Hardware Manual
Date
Description
Summary
Page
401
411
412
414
439
449
450
4 deleted
• Table 21.63 Elctrical Characteristics measurement condition modified, note 4
deleted
•Tables 21.81 and 21.82 Flash Memory Version Electrical Characteristics
note 10 modified
•Timing figure for td(P-R) and td(ROC) modified
•Table 21.85 Electrical Characteristics measurment condition modified, note 4
deleted
Usage Notes
•Figure 22.4 Use of Capacitors to Reduce Noise note 1 modified
•22.15.10 How to Access description modified
•22.15.15 Flash Memory Version Electrical Characteristics 10,000 E/W Cycle
Products description modified
C-15
RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER
HARDWARE MANUAL
M16C/29 Group
Publication Data :
Rev.0.70 Mar. 29, 2004
Rev.1.12 Mar. 30, 2007
Published by : Sales Strategic Planning Div.
Renesas Technology Corp.
© 2007. Renesas Technology Corp., All rights reserved. Printed in Japan.
M16C/29 Group
Hardware Manual
2-6-2, Ote-machi, Chiyoda-ku, Tokyo, 100-0004, Japan